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Related to trimerous: tetramerous


1. Having three similar segments or parts.
2. Botany Having flower parts, such as petals, sepals, and stamens, in sets of three.

trim′er·y n.


1. (Botany) (of plants) having parts arranged in groups of three
2. (Zoology) consisting of or having three parts


(ˈtrɪm ər əs)

1. (of flowers) having members in each whorl in groups of three.
2. (of arthropods) having three segments or parts.
[1820–30; < New Latin trimerus; see trimer, -ous]
References in periodicals archive ?
Corolla merosity: trimerous = 0; tetramerous = 1; pentamerous = 2; hexamerous = 3; octamerous = 4.
id=143&jbid=18 trimerous farce generic zyrtec http://www.
Saxifragaceae, Asteraceae), or pentamerous flowers with a trimerous gynoecium (e.
In all four genera of Dasypogonaceae, flowers are trimerous and pentacyclic, with six tepals in two alternating whorls, six stamens in two alternating whorls and a central gynoecium that is normally composed of three fused carpels located in the same floral sectors as the outer stamens and outer tepals.