The Collaborative International Dictionary
NCH33
Trimethylamine \Tri*meth`yl*am"ine\, n. [Trimethyl- + amine.] (Chem.) A colorless volatile alkaline liquid, N.(CH3)3, obtained from herring brine, beet roots, etc., with a characteristic herringlike odor. It is regarded as a substituted ammonia containing three methyl groups.