triatomic
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* tính từ- (hoá học) có ba nguyên tử
Định nghĩa tiếng Anh
a. Having three atoms; -- said of certain elements or\n radicals.\na. Having a valence of three; trivalent; sometimes, in a\n specific sense, having three hydroxyl groups, whether acid or basic;\n thus, glycerin, glyceric acid, and tartronic acid are each triatomic.