trimerous

[ trim-er-uhs ]

adjective

1. Botany. (of flowers) having members in each whorl in groups of three.
2. Entomology. having three segments or parts.

trimerous

/ ˈtrɪmərəs /

adjective

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

trimerous

/ trĭm′ər-əs /

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

Word History and Origins

Origin of trimerous¹

1820–30; < New Latin trimerus, equivalent to trimer- ( trimer ) + -us -ous

Example Sentences

This structure was formerly regarded as pointing to the fusion of two organs, and the pale was considered by Robert Brown to represent two portions soldered together of a trimerous perianth-whorl, the third portion being the “lower pale.”

From Project Gutenberg

In the Euphorbiaceae we have an excellent example of the gradual suppression of parts, where from an apetalous, trimerous, staminal flower we pass to one where one of the stamens is suppressed, and then to forms where two of them are wanting.

From Project Gutenberg

A flower in which the parts are arranged in twos is called dimerous; when the parts of the whorls are three, four or five, the flower is trimerous, tetramerous or pentamerous, respectively.

From Project Gutenberg

The symmetry which is most commonly met with is trimerous and pentamerous—the former occurring generally among monocotyledons, the latter among dicotyledons.

From Project Gutenberg

Trimerous, with its parts in threes.

From Project Gutenberg