(of plants) having parts arranged in groups of three consisting of or having three parts
WordReference Random House Unabridged Dictionary of American English © 2025
trim•er•ous
(trim′ər əs),USA pronunciation adj.
- [Bot.](of flowers) having members in each whorl in groups of three.
- [Entomol.]having three segments or parts.
- Neo-Latin trimerus, equivalent. to trimer- (see trimer) + -us -ous
- 1820–30
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