• Webster's Revised Unabridged Dictionary
    • n Trimethylamine (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.
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Century Dictionary and Cyclopedia
    • n trimethylamine A substituted ammonia in which the three hydrogen atoms are replaced by methyl, N(CH3)3. It is prepared from herring-brine, or more commonly from a waste product of the beet-sugar manufacture, and is a volatile liquid soluble in water, and having a penetrating fish-like odor. It has been used in medicine for the treatment of rheumatism.
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Chambers's Twentieth Century Dictionary
    • n Trimethylamine an organic base resembling ammonia in some of its properties, and having a strong herring-brine odour—incorrectly called propylamine
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Webster's Revised Unabridged Dictionary
Trimethyl-, + amine,


In literature:

On distilling with alkali they obtained ammonia and a trace of trimethylamine.
"Barium, A Cause of the Loco-Weed Disease" by Albert Cornelius Crawford