What does hf stand for?

Half (WDMC)

High Frequency (WDMC)

Dorsey Laboratories - Research code symbol

First Air - ICAO designator (AD)

Frequency (SAUS)

Haemorrhagic Factor (SAUS)

Hageman Factor - Factor XII - Hematology

Hagen Factor (DB)

Hair Follicle (MELL)

Hale Foundation (EA)

Half (AAG)

Half Forward (ADA)

Hammer Form (MCD)

Handling Fixture (MCD)

Hands Free

Handwriting Foundation

Hanford-Freund and Co. - Commercial firm

Hangman's Fracture - Medicine (MELL)

Hankes Foundation (EA)

Hanuman Foundation (EA)

Haplotype Frequency (STED)

Harassing Fire - Military (AABC)

Hardenability Factor (SAUS)

Hard Faced (SAUS)

Hard Facing (SAUS)

Hard Failure

Hard Fault - Automotive engineering

Hard Feces (STED)

Hard Filled - Capsules - Pharmacy

Hard Firm - Pencil leads

Harmonic Filter (ACAE)

Harmonic Function (SAUS)

Harris Flush - Medicine (BCRP)

Harry Franco - Pseudonym used by Charles F. Briggs

Hartree-Fock - Orbitals - Atomic structure

Harvest Fluid (DB)

Have Fun - Chat lingo (CHAT)

Hawthorne Farms (SAUS)

Hayden Foundation (SAUO)

Hay Fever - Medicine

Haynes Foundation (SAUO)

Hazard Free (SAUS)

Hazard Function

Haze Filter - Photography

Hazelden Foundation (EA)

Head Forward (STED)

Head of Fetus (STED)

Heart Failure - Medicine

Heat Flow - Physiology

Heavy Fuel - Engine technology

Heckscher Foundation (SAUO)

Heeresfahrzeug - Army Vehicle - German military - World War II

Height Finder - or Finding - RADAR

Heller Financial 'A' - NYSE symbol (SPSG)

Hello Friend or Have Fun or Have Faith - Common Internet slang used (TONE)

Helper Factor - Immunology

Hemlock-Fir - Lumber (WOHB)

Hemochromatosis Foundation (EA)

Hemofiltration (MELL)

Hemorrhagic Factor - Medicine

Hemorrhagic Fever - Medicine (DAVI)

HEPA Filter (SAUS)

Hepatic Fat

Hepatic Fibrosis - Medicine (MELL)

Hepatocyte Function (STED)

Heptaline Formate (SAUS)

Hercules Furens - of Euripides - Classical studies (OCD)

Herford - German license plate city code

Heritage Flight - Air show performer (ASPC)

Heritage Foundation - Washington, DC (EA)

Hertfordshire Regiment (SAUO)

Hertz Frequency (STED)

Hesperian Foundation (EA)

High Fantasy (SAUS)

High Fat - Type of diet

High Field (IAA)

High Flow (MAE)

High Flux (IAA)

High Foliage Forager - Ecology

High Food Density - Ecology

High Frequency - Electronics

High Frontier (EA)

High Functionality (SAUS)

High Rate Forward

Hind Foot (SAUS)

Hip Fracture (MELL)

Hippocampal Fissure - Neuroanatomy

History File (SAUS)

Hold Fire - Military

Holding Fixture (MSA)

Hollow Fiber

Hollow Filter - Dialyzer (STED)

Holyearth Foundation (EA)

Holy Family Fraternity (SAUO)

Holy Father (ROG)

Home Favorite

Home Fleet - Obsolete - British

Home Forces - Military - British

Home Freezer (SAUS)

Home Freight (SAUS)

Home Front

Homeopathic Foundation - Later, FHR (EA)

Homogeneous Flow (SAUS)

Hook Fast (SAUS)

Horizontal Flight (NASA)

Horse and Foot (SAUS)

Hot Finished - Drawing (DAC)

Hot Firing (MCD)

Hot Flashes (MELL)

Hot Fomentation (STED)

House File (OICC)

House Formula - An in-house formula found in a particular hospital or clinic (DAVI)

House of Fabrics, Inc. - NYSE symbol (SPSG)

Hull Filter

Human Factors

Human Fibroblast - Medicine (DMAA)

Human Foreskin - Anatomy

Huna Forschunggesellschaft - Huna Research Association - HRA - Switzerland (EAIO)

Hundred Feet

Hyden Foundation (SAUO)

Hydraulic Fluid (SAUS)

Hydrofinished - Petroleum engineering

Hydrofluorhydric Acid - The principal industrial source of fluorine

Hydrofluoric Acid

Hydrogen Fill (MCD)

Hydrogen Fluoride - Inorganic chemistry (AFM)

Hydrogen Fueler

Hyper Filtration (SAUS)

Hyperfine (SAUS)

Hyperfocal (SAUS)

Messerschmitt-Boelkow-Blohm - Germany - ICAO aircraft manufacturer identifier (ICAO)

Wander AG - Switzerland - Research code symbol

Hafnium - Chemical element

Heat of Combustion of Fuel - Aviation (DA)