What does RH stand for?

Air Rhodesia (SAUS)

Air Zimbabwe - Zimbabwe - ICAO designator (ICDA)

Rabbinic Hebrew (BJA)

Radiant Heat

Radiation Homing (AAG)

Radiation Hybrid (HGEN)

Radiation Hybrid Mapping - Biochemistry

Radiation Hydrodynamics (SAUS)

Radio Hargeisa

Radiological Health (KSC)

Railhead - British military (DMA)

Random House (SAUS)

Rankine-Hugoniot - Physics

Rapid Heating (UWER)

Reach - Telegraphy (PCTE)

Reactive Hyperemia - Medicine

Read Head (SAUS)

Receive Hub - Telegraph - Telecommunications (TEL)

Receiver Hopping (SAUS)

Receiver Hopping Mode (IAA)

Recording Head (SAUS)

Red Heat (IAA)

Red Herring - Investment term

Redhill - International vehicle registration (ODBW)

Reduced Haloperidol - An antidepressant (DAVI)

Reflection Hologram (SAUS)

Refrigeration Hardened (SAUS)

Regal Bahamas International Airlines - ICAO designator (AD)

Regional Headquarters (NOAA)

Regional Hydrologist (GIS)

Registration Hierarchy (SAUS)

Relative Humidity

Releasing Hormone - Also, RF - Endocrinology

Remote Handled (COE)

Remotely Handled

Report Heading (BUR)

Requesta Regni Hierosolymitani - A publication (BJA)

Request Header (SAUS)

Request-Response Header - Computer science (BUR)

Research Helicopter (SAUS)

Research Highlights - A publication (DIT)

Reserve Shutdown Hours (IAA)

Residential Hotels - Public-performance tariff class - British

Resistance Heating (SAUS)

Resonance Hybrid - Chemistry (UWER)

Response Header (IAA)

Retinal Hemorrhage - Medicine (DMAA)

Retractable Hardtop - Automotive engineering

Revisionist History - Taby, Sweden (EAIO)

Rheostat (IEEE)

Rheumatology (DAVI)

Rhinitis - Medicine

Rhinoceros (ROG)

Richner-Hanhart - Syndrome - Medicine (DB)

Rifle, Flintlock - NCIC gun type code (NCIC)

Right Half (SAUS)

Right Halfback - Soccer

Right Hand - Firearms use code - Firearms collecting (FAUC)

Right-Hand (SAUS)

Right-Handed (SAUS)

Right Heel (SAUS)

Right Hemisphere - Medicine (DB)

Right Hind (SPVS)

Right Hyperphoria - Medicine

Road Haulage

Rocket Head (SAUS)

Rockwell Hardness

Roger Houghton Ltd. - Publisher - British

Room Humidifier (DMAA)

Rosh Hashanah - New Year (BJA)

Roth - German license plate city code

Rottlund Co. - AMEX symbol (SPSG)

Rotuli Hundredorum - Latin - A publication (DLA)

Roughness Height (SAUS)

Round Head

Roundhead (SAUS)

Round Hole - Looseleaf binding (DGA)

Round House - Maps and charts

Round Hump (SAUS)

Royal Highlanders - Military unit - British

Royal Highness

Royal Hospital - Chelsea - British military (DMA)

Royal Hussars - Military unit - British

Rueckwaertiges Heeresgebiet - Rear area of a group of armies - German military

Runaway Hotline (EA)

Running Head - Printing (WDMC)

Running Hour (SAUS)

Ryan's Hope - Television program

Southern Rhodesia - ANSI two-letter standard code - Obsolete (CNC)

Texas Runaway Hotline (EA)

Zimbabwe - NCIC country-territory code (NCIC)

Rhesus - Blood factor

Rhetorica - of Aristotle - Classical studies (OCD)

Rheumatism - Medicine

Rhipicephalus - A genus of cattle tick (DAVI)

Rhodium - Chemical element

Rhodopsin - Visual Purple

Rockwell Hardness (MIST)

Rheumatic - Medicine (MAE)

Rhodesia - Southern Rhodesia - MARC country of publication code - Library of Congress (LCCP)

Rhonchi - Rales - Latin (MAE)