- Botany. (of flowers) having members in each whorl in groups of three.
- Entomology. having three segments or parts.
Origin of trimerous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for trimerous
So in fuchsias, a very common deviation consists in a trimerous and rarely a dimerous symmetry of the flower.Vegetable Teratology
Maxwell T. Masters
A very minute joint at the base of the claw-joint, in most Tetramerous and Trimerous beetles.
Trimerous insects are those whose tarsi consist of only three joints.
- (of plants) having parts arranged in groups of three
- consisting of or having three parts
- Having three similar parts or segments.
- Having flower parts, such as petals, sepals, and stamens, in sets of three.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.