What does P stand for?

Aircraft [Wind triangle problems]

All India Reporter, Patna [A publication] (DLA)

Armour Pharmaceutical Co. [Research code symbol]

Assistant in Private Practice [Chiropody] [British]

Asta Werke AG [Germany] [Research code symbol]

Bristol Laboratories [Research code symbol]

cis-Platinum [Cisplatin] [Also, cis-DDP, CDDP, CPDD, CPT, DDP] [Antineoplastic drug]

Dainippon Pharmaceutical Co. [Japan] [Research code symbol]

Democratic People's Republic of Korea [Aircraft nationality and registration mark] (FAAC)

Departure

Electric Dipole Moment (BARN)

Farbenfabriken Bayer [Germany] [Research code symbol]

Farmitalia [Italy] [Research code symbol]

Faulty Punctuation [Used in correcting manuscripts, etc.]

first class premium (SAUS)

Force of Concentrated Load

Games [or Matches] Played [Sports statistics]

gas pressure in blood (SAUS)

Hole P-Type Semiconductor Material

Indian Law Reports, Patna Series [A publication] (DLA)

Law Reports, Probate, Divorce, and Admiralty [Since 1890] [England] [A publication] (DLA)

Lepetit [Italy] [Research code symbol]

Mainsail Hoist Lenght [IOR]

North Korea [Civil aircraft markings - international] (PIPO)

Office of Personnel [Coast Guard]

Orbital Period [of a comet] [In years]

Overpressure [Emergency Management] (EMA)

Pacer

Pacific Coast Stock Exchange [Later, PSE]

Pacific Reporter [A publication] (DLA)

Pacific Stock Exchange (SPSG)

Pack [JETDS]

Packed Lunches [School meals] [British]

Pad (SAA)

Paddington Railway Station (ROG)

Paddle (DS)

Page

Paid This Year [In stock listings of newspapers]

Pain [Medicine]

Paint Research Institute (EA)

Pair (IAA)

Paired [for or against] [Votes in Congress]

Paise [Monetary unit] [India]

Palace (ROG)

Pale (ADA)

Pallet [Spacelab] [NASA] (NASA)

Pamphlet

Panama Line (SAUS)

Pancreas (MELL)

Pancuronium [A muscle relaxant]

Pandects [A publication] [Authority cited in pre-1607 legal work] (DSA)

Panel (NFPA)

Papa [Phonetic alphabet] [International] (DSUE)

Papa [Pope] [Latin]

Paper

Paperback (WGA)

Papilla [Optic] [Medicine]

Papillate [A type of seed] [Botany]

Para [Monetary unit] [Former Yugoslavia]

Parabellum (GOBB)

Parachutist [Army skill qualification identifier]

Paragraph (ADA)

Paralegal Program [Association of Independent Colleges and Schools specialization code]

Parallax

Parallel

Paramecin [A protozoan toxin]

Parashah (BJA)

Pardon (ADA)

Parenchyma [Botany]

Parent (CPH)

Parental

Parental Generation (ODA)

Parentalgeneration (SAUS)

Parietal Electrode Placement in Electroencephalography [Medicine] (DMAA)

Parish (ROG)

Parity [Obstetrics] (DAVI)

Parity [Atomic physics]

Park

Parking Place [Traffic sign] [British]

Parlophone [Record label] [Great Britain, Italy, Australia, etc.]

Parous (STED)

Parson

Part

Parthian [Language, etc.]

Partial [Astronomy]

Partial Agonist [Pharmacology] (QSUL)

Partial Pressure (MAE)

Partial Tension [Medicine] (DAVI)

Participle [Grammar]

Partim [In Part]

Partnership

Party

Parve [or Pareve] [In food labeling, indicates food is kosher and can be used with either meat or dairy products]

Pass (SAUS)

Passable (SAUS)

Passed [Examination]

Passenger [Automotive tire designation]

Passing Showers [Meteorology]

Past

Paste

Pasteboard (DGA)

Pasteurella [Genus of bacteria]

Pastor

Patella (MELL)

Patent

Pater [Father] [Latin]

Paternal (STED)

Paternally Contributing [Genetics] (DAVI)

Patient

Patrol [Designation for all US military aircraft]

Patrol Service Gunnery Instructor [Officer's rating] [British Royal Navy]

Patron

Pattern

Paulus de Liazaris [Deceased, 1356] [Authority cited in pre-1607 legal work] (DSA)

Paused Program [Computer science]

Paved Surface [Aviation] (DA)

Pavilion (ROG)

Pawn [Chess]

Pax [Peace] [Latin]

Pay

Payee

Paymaster [Military] (ROG)

Peak

Pear (SAUS)

Peat (ROG)

Pebbles [Quality of the bottom] [Nautical charts]

Pectoral [Anatomy] (ROG)

Pedal (WDAA)

Pedestrian (WDAA)

Pedicle [Medicine] (EDAA)

Pediculus [Medicine] (EDAA)

Peg [Telecommunications] (IAA)

Pelagius [Deceased, 1232] [Authority cited in pre-1607 legal work] (DSA)

Pellagra [Medicine] (MELL)

Pelvis (STED)

Pen [Sports]

Pencil Tube (MDG)

Pengo [Monetary unit in Hungary until 1946]

Penicillin

Pennsylvania (DLA)

Pennsylvania State Library, Harrisburg, PA [Library symbol] [Library of Congress] (LCLS)

Penny

Pennzoil (SAUS)

Pentachlorophenol [Also, PCP] [Wood preservative] [Organic chemistry] (TEL)

Pentode [Electronics] (OA)

Peony [Horticulture]

People

Pepper (DICI)

Per

Percent (STED)

Percentile

Perceptual

Perceptual Speed [A factor ability] [Psychology]

Perch

Perchloroethylene [Also, TCE] [Dry cleaning]

Percussion

Pere [Father] [French]

Perforateur Honeywell Bull (IAA)

Perforating (SAUS)

Perforation

Performance [Army]

Performer

Perfusionist [Medicine] (DAVI)

Perianth

Pericardium [Medicine]

Perimeter

Period

Peripheral (DAVI)

Periphery (SAUS)

Perishable

Peritoneum [Medicine] (MELL)

Permanent [Inks] (DGA)

Permanent Stay [in hospital] [British]

Permeability (STED)

Permeance (IDOE)

Permian [Paleontology] (QSUL)

Permutation (NITA)

Perpetuus [Uninterrupted] [Latin]

Persian (DLA)

Persimmon

Persistence [Medicine]

Person

Personal (DA)

Personality Organization and Stability [Eysenck] [Psychology]

Personnel

Person to Person [Telecommunications] (TEL)

Perstetur [Continue] [Pharmacy] (ROG)

Persuasion [Novel by Jane Austen]

Peseta [Monetary unit] [Spain and Latin America]

Pesewa [Monetary unit] [Ghana]

Pesher (BJA)

Peshitta (BJA)

Peso [Monetary unit] [Spain and Latin America]

Peta [A prefix meaning multiplied by 10¹⁵] [SI symbol]

Peter [Phonetic alphabet] [World War II] (DSUE)

Peter [New Testament book]

Peters' United States Supreme Court Reports [26-41 United States] [A publication] (DLA)

Petiole [Botany]

Petite (WGA)

Petrol [British Waterways Board sign]

Petrus Hispanus [Authority cited in pre-1607 legal work] (DSA)

Peyote

Pfizer, Inc. [Research code symbol]

Pharmacopoeia

Pharmacy (WDAA)

Pharynx (MELL)

Phenacetin (STED)

Phencyclidine [An anesthetic]

Phenolphthalein [Chemical indicator]

Phenylalanine [Medicine] (EDAA)

Philadelphia [Pennsylvania] [Mint mark, when appearing on US coins]

Philadelphia Stock Exchange, Inc.

Phillips Petroleum [NYSE symbol]

Phillips Petroleum Co. [NYSE symbol] (SPSG)

Phoenician (BJA)

Phon [Unit of loudness level]

Phone (IAA)

Phosphorescence (SAUS)

Phosphorus [Chemical element]

Photographic Reconnaissance Capability [When suffix to Navy aircraft designation]

Phototropism [Botany]

Phrase [Linguistics] (IEL)

Phrase Structure Rule [Linguistics]

Physics [Secondary school course] [British]

Physiology [Medical Officer designation] [British]

Phytophthora [A fungus]

Piaggio Rinaldo [Industria Aeronautiche & Meccaniche SpA] [Italy] [ICAO aircraft manufacturer identifier] (ICAO)

Pianissimo [Very Softly] [Music]

Piano [Softly] [Music]

Piaster [Monetary unit] [Spain, Republic of Vietnam, and some Middle Eastern countries]

Pick (IAA)

Pickering's Massachusetts Reports [18-41 Massachusetts] [A publication] (DLA)

Pico

Picot [Crochet] (ROG)

Pie

Piece Goods Buyers Association (EA)

Pied [Foot] [French]

Pierced [Quilting]

Pigs (ROG)

Pilaster [Technical drawings]

Pillar [Buoy]

Pilot

Pilotage (SAUS)

Pilotless (SAUS)

Pincherle Catalogue [Vivaldi] (GROV)

Pink

Pinnule

Pint

Pip [Phonetic alphabet] [Pre-World War II] (DSUE)

Pipe

Pipe Rolls [British]

Pique; Inclusions [Diamond clarity grade]

Pitch [Technical drawings]

Pitch [or Pitcher] [Baseball]

Pitcher (NTIO)

Pith [Botany]

Pitman Examination Institute [British]

Pitman-Moore Co. [Research code symbol]

Pius [Dutiful] [Latin]

Placebo [Medicine]

Placentinus [Deceased, 1192] [Authority cited in pre-1607 legal work] (DSA)

Placitum [or Placita] [Agreeable, Agreed Upon] [Latin] [Legal term] (DLA)

Plaintiff [Legal shorthand] (LWAP)

Plan (CPH)

Planed [Lumber] (WOHB)

Planed

Planning

Plasma

Plasmodium [Biology] (MAE)

Plastid [Botany]

Plate [Electron tube] [Technical drawings]

Platform (DCTA)

Plato [Density measurement] (BEBR)

Players League [Major league in baseball, 1890]

Pleasant

Pleinsbachian [Geology]

Pleyel (SAUS)

Plotter [British military] (DMA)

Plug

Plus [More]

Pneumocystis [Medicine] (EDAA)

Poco [Somewhat] [Music]

Point [Lacrosse position]

Point-to-Point Radio [FAA designator] (CET)

Poise [Unit of dynamic viscosity]

Poison

Polar Distance [Navigation]

Polarizability (SAUS)

Polarization

Pole

Political Division [Geography]

Polka [Music]

Pollen [Botany]

Pollicis (MELL)

Poll rate (SAUS)

Polymorphic [Biology]

Polymyxin [An antibiotic] (DAVI)

Polyneuropathy [Medicine]

Polynomial Time (IAA)

Polyphagous [Biology]

Polytechnic (AIE)

Pond [Maps and charts]

Pondere [By Weight] [Latin]

Ponendum [To Be Placed] [Latin]

Pontifex [Bishop] [Latin]

Pool

Poop [Portion of a ship]

Poorly Organized, Unstable Personality [Eysenck] [Psychology]

Poor Skiing Conditions

Pope

Popular Response [Rorschach] [Psychology]

Population

Populus [People] [Latin]

Porcelain

Porphyrin [Medicine] (DAVI)

Port [Maps and charts]

Portable [JETDS nomenclature]

Portable Drilling Rig Manufacturers Association (EA)

Portion

Portland [Diocesan abbreviation] [Oregon] (TOCD)

Portugal [IYRU nationality code]

Position

Positive (IAA)

Positive Conducting [Electronics] (IAA)

Post [After] [Latin]

Post [Surgery laboratory work] (DAVI)

Postage

Posten [Sentry] [German military]

Posterior

Postpartum [Medicine]

Potsdam [German license plate city code]

Pott's Shunt [Medicine] (EDAA)

Pouce [Inch] [French]

Pound (IDOE)

Pounds [As measurement of total stress] [Aerospace] (AAG)

Pour [For] [French]

Power [Symbol] [IUPAC]

Poynting Vector [Electromagnetism] (DEN)

Practical

Practical Intelligence

Pre-1920 [Deltiology]

Preceding

Precipitation Static

Precise Code [Computer science]

Precision (SAUS)

Precursor (MELL)

Predators Present [Ecology]

Predicate

Predictor [British military] (DMA)

Prednisolone [Endocrinology]

Prednisone [Also, PDN, Pr, Pred, Pro] [Endocrinology] [Antineoplastic drug]

Preferred

Prefix [Indicating a private radiotelegram]

P-Register [Computer science]

Preliminary

Premolar [Dentistry]

Preposition [Linguistics] (IEL)

Presbyopia [Ophthalmology]

Presbyterian

Prescribing

Present

Present BIT [Binary Digit] [Computer science]

Preset

President

Press [Publishing]

Pressure [or p] [Symbol] [IUPAC]

Pressurized Tank [Liquid gas carriers]

Preview

Prey [Zoology]

Price [Economics]

Pridie [The Day Before] [Latin]

Priest

Priestly (SAUS)

Priestly Source [Biblical scholarship]

Prilled

Primary

Primary [or Push] Wave [Earthquakes]

Prime

Primipara [Woman bearing first child] [Medicine] (MAE)

Primitive

Primus [First] [Latin]

Prince

Princeps [First Edition] [French]

Princess (ROG)

Principal

Print

Printer [Communications term] (DCT)

Printing Industry Credit Exchange/PIA (EA)

Prions [Medicine] (MELL)

Priority [Telecommunications] (TEL)

Priority Precedence (SAUS)

Priory

Prismatic Joint (IAA)

Prisoner [Military]

Private

Private Trust [Includes testamentary, investment, life insurance, holding title, etc.] [Legal term] (DLA)

Private Venture

Privy (ROG)

Pro [For] [Latin]

Probability [or Probability Ratio] [Statistics]

Probate

Probe (MSA)

Probucol [Anticholesteremic]

Procarbazine [Also, PC, PCB, Pr] [Antineoplastic drug]

Procedure

Proceedings (IAA)

Processor [Computer science]

Proconsul

Producer [Films, television, etc.]

Product

Production [of Energy]

Profession

Professional [Civil Service employees designation]

Professional Resellers Organization (EA)

Professor

Proficiency

Profit

Progesterone [A hormone]

Program (KSC)

Programmable

Progressive

Prohibited Area [Followed by identification]

Prolactin (MELL)

Proliferation [Biology]

Proline [One-letter symbol; see Pro]

Promoter [Genetics]

Prompt [i.e., the right side] [A stage direction]

Proof [Philately]

Prop (DS)

Propagation Distribution [Broadcasting]

Propionic [Bacteriology] (DAVI)

Proportional (IAA)

Proportion in a Specific Class

Propulsion (AAG)

Protected [Communications term] (DCT)

Protein

Proteinuria [Clinical chemistry]

Protestant

Protet [Protest] [French]

Proteus [Genus of bacteria] (MAE)

Proto [Linguistics]

Protoplasmic [Freeze etching in microscopy]

Prototroch

Prototype (AAG)

Provisional

Proximal [Medicine] (EDAA)

Pseudomonas [Medicine] (EDAA)

Psychiatry

Psychometrist [Psychology]

Public (AL)

Publications

Public Houses [Public-performance tariff class] [British]

Public Safety [FCC] (NTCM)

Pudding [Phonetic alphabet] [Royal Navy] [World War I] (DSUE)

Pugillus [A Handful] [Pharmacy] (ROG)

Pula [Monetary unit] (ODBW)

Pull (NFPA)

Pulled Up [Horse racing]

Pulmonary (MELL)

Pulse

Pump (AAG)

Punch

Punic (BJA)

Punkt [Point] [German military]

Punter [Football]

Pupil

Purchased (AAG)

Purified [Animal breeding]

Purinethol [Mercaptopurine] [Also, M, MP] [Antineoplastic drug]

Purkinje Cell [Neuroanatomy]

Purl [Knitting]

Purple

Purpure [Purple] [Heraldry]

Pursuit [Airplane designation]

Put [In options listings of newspapers]

Pya [Monetary unit] [Myanmar]

Pylon (SAUS)

Pyroxene Subgroup [Acmite, sodium metasilicate, potassium metasilicate, diopside, wollastonite, hypersthene] [CIPW classification] [Geology]

RADAR [JETDS nomenclature]

Rank Correlation (DIPS)

Reproducing [JETDS nomenclature]

Rippled Lipid Phase [Biochemistry] (QSUL)

Roll Rate

Single Paper [Wire insulation] (AAG)

Soft Pad [Missile launch environment symbol]

Warner-Lambert Pharmaceutical Co. [Research code symbol]

Density [Heat transmission symbol]

Difficulty [of a test item] [Psychology]

Druck (SAUS)

fluid density (SAUS)

Momentum [Symbol] [IUPAC]

On Probation [Navy] [British]

Pacific Ocean [MARC geographic area code] [Library of Congress] (LCCP)

Pallet (NAKS)

Para [Chemistry]

Part (WDMC)

Participle (NTIO)

Passing Showers (ODA)

Past (WDMC)

P-Doped Semiconductor [Photovoltaic energy systems]

Peculiar [Astronomy]

Pence [Monetary unit] [British]

Penni(a) [Penny or Pence] [Monetary unit] [Finland] (GPO)

Penny (ODBW)

Per (WDMC)

Percussion (ODA)

Period (NAKS)

Perseverate [Psychology]

Peso (NTIO)

Peta, 1 E15 [Industrial hygiene term] (OHS)

Phosphate [One-letter symbol] [Biochemistry]

Phosphoric Residue [As substituent on nucleoside] [Biochemistry]

Pica [Typography] [Also, P] (WDMC)

Pico [A prefix meaning divided by one trillion] [SI symbol]

Pitch (NAKS)

Plasma [Medicine] (QSUL)

Pole (NAKS)

Pondus [Weight] [Latin] (MAE)

Populus (GEAB)

Positive [Crystal]

Post, After [Therapy term] (CTAA)

Power (MIST)

Practical Intelligence (DIPS)

pre-cell (SAUS)

Pressure (NAKS)

Primary (NAKS)

Prime (NAKS)

Probability (DIPS)

Proton [A nuclear particle]

Proximum [Near] [Latin] (MAE)

Pyranose [One-letter symbol] [Biochemistry]