What does Hb stand for?

Habakkuk - Old Testament book

Haemoglobin - Medicine (WDAA)

Handbook (DIAR)

Hebrew (BJA)

Hemoglobin - Biochemistry, medicine

Air Melanesiae - ICAO designator (AD)

Bell Helicopter Co., Brantly Helicopter Corp., Brditschka - Heinrich Brditschka Flugzeugbau - ICAO aircraft manufacturer identifier (ICAO)

Bremerhaven - German license plate city code

Brinell Hardness (SAUS)

Brinell Hardness Number - Also, BH, BHN, BHNo

Farbwerke Hoechst AG - Germany - Research code symbol

Hal Biestek - Air show performer (ASPC)

Halfback - Football

Half Bound - Bibliography

Half Bow - Music (ROG)

Half Breadth (AAG)

Half Brick (SAUS)

Halk Bankasi - Peoples Bank of Turkey - See also THB

Hallelujah Band

Halogen Bulb

Hampton & Branchville Railroad Co. - AAR code

Handbook (NASA)

Handlebar (ROG)

Happy Birthday - Chat lingo

Hard Ball - Military technology (DDF)

Hard Black - Pencil leads

Hardboard (ADA)

Hard-Boiled - Egg

Hardy Biennial - Horticulture (ROG)

Harvard Bulletin - A publication (SAUS)

Has Been - Telegraphy (PCTE)

Hatchback - Automotive advertising

Hawkes Bay (SAUS)

Hawthorne Books (SAUS)

Head Backward (STED)

Headband (IAA)

Health Benefit

Health Benefits (SAUO)

Health Board - Ireland

Heart Block - Medicine

Heartburn (MELL)

Heat Budget Instrument (SAUS)

Heat to Boiling Point - Calorimetry

Heavy Barrel - Rifles

Heavy Battery (SAUS)

Heavy Bombardment - or Bomber

Heavy Bomber (SAUS)

Heavy Bombing (SAUS)

Heel to Buttock (DMAA)

Held Back (DMAA)

Held Backward (STED)

Hemoglobin - Medicine (DMAA)

Hemolysis Blocking - Medicine (STED)

Henricus Boich - Flourished, 1320-30 - Authority cited in pre-1607 legal work (DSA)

Hepatitis B - Medicine

Herba - Herb - Pharmacology (ROG)

Herders Bibelkommentar - A publication (BJA)

Herri Batazuna - Union of the People - Spain - Political party (PPE)

H. H. Burkitt Project Management, Inc. - Commercial firm

High Band (AAG)

High Bay (KSC)

High Boilers

High Bridge (SAUS)

Highways and Byways - A publication

Hill-Burton - Federal grant and loan program for construction and modernization of medical facilities

Hillenbrand Industries, Inc. - NYSE symbol (SPSG)

Hinged Block - British military (DMA)

His Beatitude - or His Blessedness

His Blessedness (SAUO)

His Bundle - Cardiology

Historical Branch - Army

Historical Bulletin - A publication (SAUS)

Hit by Ball - or Hit Batsman - Baseball

Hold Breakfast - Medicine

Holiness Band

Hollow Back - Lumber (WOHB)

Hollowback (DAC)

Hollow Bark (MIST)

Hollow Base (SAUS)

Home Banking (SAUO)

Home Base (ACAE)

Home Bus (SAUS)

Homing Beacon - Aviation

Honey Bee

Honeywell-Bull

Horizontal Baffle (NRCH)

Horizontal Bands - Navigation markers

Horizontal Beacon (SAUS)

Horizontal Bomber

Horizontal Branch (SAUO)

Horizontal-Branch - Astronomy

Horizontal Bridgman - Crystal growing technique

Horizontal Buoy (SAUS)

Hormone Binding - Endocrinology

Horn Book Magazine - A publication (BRI)

Horse Battery (SAUS)

Hose Bib (AAG)

Hospital Bed (DAVI)

Hot Boning - Meat processing

House Bill - In state legislatures

Housebound (MAE)

Housebreaking

Household Bank (SAUS)

Household Battalion - British military (DMA)

Household Goods/Baggage

House of Bishops (SAUS)

Housing Benefit - British

Howitzer Battery (SAUS)

Hug Back - Chat lingo

Human Behavior - National Science Foundation project

Human Being - Slang

Hunchback (MELL)

Huntington Beach - California

Hurry Back - Internet lingo

Hutchinson-Boeck - Disease - Medicine (DB)

Hybridoma - Cytology

Hybridoma Bank (DMAA)

Hydroxybenzene (SAUS)

Hyoid Body (DMAA)

Hyoid Bone (MELL)

Hyperion Bay - Television program title

Switzerland and Liechtenstein - Civil aircraft markings - international (PIPO)

United People (Spain) - Political party (PSAP)

Halfback (ADWA)

Handbook (ELAL)

Hemoglobin - Medicine (BCRP)

Deuterium - Radioisotope of hydrogen (DAVI)