What does Hm stand for?

Haymarket (SAUS)

Hyperopia Manifest - Ophthalmology (DAVI)

Manifest Hypermetropia - Medicine

Manifest Hyperopia - Medicine (PALA)

Heard and McDonald Islands - MARC country of publication code - Library of Congress (LCCP)

Hectometer (ADWA)

hectometre (SAUS)

hectometric (SAUS)

Hematite - CIPW classification - Geology

Hydroxymethyl - As substituent on nucleoside - Biochemistry

Air-Cushion Vehicle Built by Hovermarine - Usually used in combination with numerals

Air Mahe - ICAO designator (AD)

Habitation Module (SSD)

Haematite (SAUS)

Hahns Macaw - Bird

Half Morocco

Hallmark

Hamarein Air - United Arab Emirates - ICAO designator (ICDA)

Hameln-Pyrmont - German license plate city code

Hampshire Regiment (SAUO)

Handelsministerium (SAUO)

Hand-Made (SAUS)

Hand Motion - Vision - Neurology (DAVI)

Hand Movement

Hands of Mercy - An association (EA)

Harbor Master

Hard Magnetic (SAUS)

Hardness Maintenance (MSA)

Hardware Malfunction (SAUS)

Hardware Monitoring (SAUS)

Hardware Multiple

Harmonic Mean - Music

Harmonic Motion (SAUS)

Harper's Magazine - A publication (BRI)

Hazard Mitigation - Emergency Management (EMA)

Hazardous Material (DNAB)

Head Master (SAUO)

Head Mistress (SAUO)

Head Motion - Gravity

Head Movement (SAUO)

Health Maintenance (DB)

Health Ministries (EA)

Health Monitoring - Environmental science (COE)

Healthy Male (ROG)

Heard and McDonald Islands - ANSI two-letter standard code (CNC)

Heart Murmur - Cardiology (MAE)

Heated Mirrors - Automotive engineering

Heater Middle (IAA)

Heater Mid-tap (SAUS)

Heavily Muscled (STED)

Heavy Maintenance - Ordnance

Heavy Metal - Rock music type

Heavy Metal - Inorganic chemistry

Heavy Mobile

Hebra-Medin - Medicine (QSUL)

Hectometer - 100 meters

Heimlich Maneuver - Medicine (MELL)

Heine-Medin - Disease - Medicine (DB)

Helicopter Mine Countermeasure Squadron - Military (DOMA)

Heloma Molle - Medicine (MELL)

Hemifacial Microsomia - Medicine (MELL)

Hepatic Metabolism (STED)

Hepatic Microcirculation - Physiology

Heritage Manor (BJA)

Hermeter Master - Freemasonry (ROG)

Hertwig-Magendie - Syndromes - Medicine (QSUL)

Hexamethylmelamine (STED)

Hidden Memory (SAUS)

Hidden Mickey - Disney (DIS)

High Magnification (SAUS)

High-Meaningfulness - Psychology

High Melting (OA)

High-Melting (SAUS)

High Modulus - Mechanical engineering

High-Modulus (SAUS)

High Molecular - Weight - Also, HMW - Organic chemistry

High-Resolution Monochrome (VLIE)

Him - Telegraphy (PCTE)

Hinge Mount (MCD)

His - or Her Majesty

Hispanic Male (MELL)

Historia Mathematica - A publication

History of Medicine (SAUO)

HM - NCIC trailer make code

Hmong-Mien - Linguistics (IEL)

Hoc Mense - In This Month - Latin

Hoist Motor (SAUS)

Hold Mode (SAUS)

Hollerith Machine (SAUS)

Hollow Metal - Technical drawings

Hologram Memory (SAUS)

Holosystolic Murmur - Medicine (MELL)

Holter Monitor (STED)

Home (ROG)

Home Mission

Homestake Mining Co. - NYSE symbol (SPSG)

Home Zone (JAGO)

Homogenization Medium

Honorary Member - Freemasonry (ROG)

Honourable Mention (SAUS)

Horizontal Marriage

Horizontal Meridian - Optics, eye anatomy

Horniman Museum - London

Hoshen Mishpat, Shulhan 'Arukh (BJA)

Hospital Corpsman - Navy rating

Hospital Management (STED)

Hot Mix (SAUS)

Houghton Mifflin Co. - Publisher

Hours, Minutes (ROG)

House Magazine - Australia - A publication

Housing Management - HUD

Huius Mensis - This Month's - Latin

Human Milk - Biochemistry (MAE)

Humidity Mask (MELL)

Huntingdon Militia - British military (DMA)

Hybrid Modulation (SAUS)

Hydatidiform Mole - Gynecology

Hydra Medium - Culture medium

Hydraulic Modelling (SAUS)

Hydrogen MASER

Hydromagnetic (SAUS)

Hydromechanical (SAUS)

Hydrometallurgy (SAUS)

Hydrometeorological

Hyperimmune Mice

Hypermedia (SAUS)

Hypothetical Machine (MHDB)

Hypoxic-Metabolic (STED)

Hysteresis Motor - Electronics (IAA)

Marine Helicopter Squadron

Master of Humanities

Sandoz - Italy - Research code symbol

Sisters of the Humility of Mary - Roman Catholic religious order

The Haunted Mansion - Disney (DIS)