tris

1 of 2

noun

ˈtris 

often capitalized

: a white crystalline powder C₄H₁₁NO₃ used as a buffer (as in the treatment of acidosis)

called also tris buffer, tromethamine

Tris

2 of 2

noun

: a phosphoric acid ester C₉H₁₅Br₆O₄P formerly used to flameproof clothes and especially children's nightclothes until it was found to cause cancer in animals