G G symbol for giga; gingival; glucose; gonidial; guanine. g 1. gravity; the unit of force exerted upon a body during acceleration and deceleration. 2. gram (or grams). γ gamma,…

E e- for words beginning thus, see also those beginning oe-. ε epsilon, small letter; fifth letter in the Greek alphabet. Used to designate random error in regression analysis. η…

H H chemical symbol, hydrogen;; Hounsfield unit. H+ symbol, hydrogen ion. H+,K+-ATPase an enzyme of the gastric parietal cell involved in the terminal step of gastric acid secretion in the…

N N 1. symbol, newton. 2. chemical symbol, nitrogen. 3. symbol, normal (solution); the expressions 2N (double normal), 0.5N (halfnormal), 0.1N (tenth-normal), etc., denote the strength of a solution in…

S S chemical symbol, sulfur; symbol for siemens and svedberg; [L.] semis (half); sight; [L.] signa (mark); [L.] sinister (left). S phase see cell cycle. S1 first heart sound. S2…

C C chemical symbol, carbon; cathode (cathodal); Celsius or centigrade (scale); cervical; clearance; clonus; closure; contraction; cylinder; cytosine; in the electrocardiogram, C stands for chest (precordial) lead2; symbol for complement….

M M macerate; maximal; symbol, mega; member; meter; minim; [L.] mil or mille (thousand); misce (mix); mistura (mixture); symbol, molar (solution)—the expressions M/10, M/100, etc., denote the strength of a…

T T symbol, tesla; tera-; (absolute) temperature; thymine. T1 in magnetic resonance imaging, a time constant; called also spin-lattice relaxation time. T1 recovery the time taken for about 63% of…

L L Latin; left; length; [L.] libra (pound, balance); licentiate; light sense; [L.] limen (boundary); liter; lumbar; coefficient of induction. L0 Ehrlich’s symbol for a toxin–antitoxin mixture that is completely…

R R symbol, roentgen; a symbol used in general chemical formulae to represent an organic radical; Rankine (scale); Réaumur (scale); [L.] remotum (far); respiration; Rickettsia; right. r symbol for ring…