Medical Definition of tris
: a white crystalline powder C4H11NO3 used as a buffer (as in the treatment of acidosis)—called also tris buffer, tromethamine
Medical Definition of Tris
: a phosphoric acid ester C9H15Br6O4P formerly used to flameproof clothes and especially children's nightclothes until it was found to cause cancer in animals
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Spanish Central: Translation of tris
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