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.
[1913 Webster]