HIK

Hb, HGB

hemoglobin

HBV

hepatitis B virus

HCG

human chorionic gonadotropin

HCI

hydrochloric acid

Het, crit

hematocrit

HDL

high-density lipoprotein

Hg

mercury

hecto-

hundred

hemi-

half

hemo-, hemato-

blood

hepato-

liver

hetero-

different

HIV

human immunodeficiency virus

H2O

water

homo

same

HPF

high power field

HTLV

human T-cell lymphocytic virus (AKA HIV)

Hx

history

hydro

water

hyper

too much, increased

hypo

too little, decreased

Hep.

Heparin

H&H

hemoglobin and hematocrit

ICU

intensive care unit 

ICC

intensive coronary care

IC

Infection Control

IBC

iron binding capacity

ID

identification

idio-

peculiar (usually refers to unknown origin)

Ig

immunoglobulin (antibody)

IM

intramuscular or infectious mononuclcosis

intra-

within

inter-

between

I&O

intake and output

-ism

condition

iso

equal, same

-ist，-i

one who practices

-itis

inflammation

IU

international unit

IV

intravenous

IVP

intravenous pyelogram (x-ray test using injected dye)

K

potassium

kg

kilogram

kilo

thousand

KOH

potassium hydroxide

KVO

keep vein open

Km

kilometer