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thrombin the enzyme in the blood that causes it to clot.
thromboplastin a substance found in animal tissue, esp. blood platelets, that assists in blood clotting by converting prothrombin to thrombin.
thrombosis an abnormal clotting of blood in the circulatory system.
thrombus a blood clot that forms within and obstructs a blood vessel or cavity of the heart.
throne the seat occupied by a ruler or high secular or religious official on ceremonial occasions or when holding audience. [2 definitions]
throng a large crowd of people. [5 definitions]
throttle a valve in a machine, esp. an automobile engine, that controls the flow of fuel, air, or the like. [5 definitions]
throttleable combined form of throttle.
through in one side or end and out the other. [17 definitions]
throughout in, to, or during every part of. [3 definitions]
throughway variant of thruway.
throve a past tense of thrive.
throw to send through the air with some force, esp. by a sudden straightening of the arm and wrist; hurl. [14 definitions]
throw a monkey wrench into to disrupt the organization, functioning, or realization of.
throw away to discard as trash or garbage. [2 definitions]
throwaway a freely distributed handbill or leaflet, usu. given out or left in public places. [3 definitions]
throwback an instance of reversion to an earlier stage, form, or the like, esp. in biological evolution. [2 definitions]
throw down the gauntlet to challenge another, esp. to a fight.
throw in the sponge (informal) to admit defeat or inability.
thrown past participle of throw.
throw rug see scatter rug.