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a.c. ad lib a.m., AM b.i.d. C cc cm cm3 d dL F fL ft g hr h.s., HS IM IV J K kg L lb m mA mcg MCi mEq mEq/L mg mg/cc mg/dL mg/kg mIU mL mm mmHG Mmol mOsm mU ng n.p.o. oz p.c. pg p.m., PM p.o., PO p.r.n. q. q.a.m. q.h.s. q.i.d. q.p.m. q.6h. t.i.d. U IU | before meals as desired before noon twice a day Celsius; centigrade cubic centimeter centimeter cubic centimeter day deciliter Fahrenheit femtoliter foot gram hour bedtime intramuscular/intramuscularly intravenous/intravenously joule kelvin kilogram liter pound meter milliampere microgram millicurie milliequivalent milliequivalents per liter milligram milligrams per cubic centimeter milligrams per deciliter milligrams per kilogram milli-International Unit milliliter millimeter millimeters of mercury millimole milliosmole milliunit nanogram nothing by mouth ounce after meals picogram afternoon by mouth as needed every every morning every bedtime four times a day every afternoon/evening every six hours three times a day Unit International Unit |