SG Heritage Dictionary

Trimethyl Webster's Dictionary 1913

A prefix or combining form (also used adjectively) indicating the presence of three methyl groups.

Trimethylamine [Noun] Webster's Dictionary 1913

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.

Trimethylene [Noun] Webster's Dictionary 1913

A gaseous hydrocarbon, C3H6, isomeric with propylene and obtained from it indirectly. It is the base of a series of compounds analogous to the aromatic hydrocarbons.