Definition of "trimerous" []

• Having three similar segments or parts. (adjective)
• Botany Having flower parts, such as petals, sepals, and stamens, in sets of three. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Thus trimerous fuchsias and tetramerous jasmines may frequently be met with, and Turpin describes a tetramerous flower of _Cobæa scandens_."
• "So in fuchsias, a very common deviation consists in a trimerous and rarely a dimerous symmetry of the flower."
• "It differs from P. virginiana in its longer leaves, brittle branches, and much greater height, from P. glabra in its rough upper trunk, and from both by the frequent presence of trimerous leaf-fascicles."