trimerous

American  

[trim-er-uhs] / ˈtrɪm ər əs /

adjective

1. Botany. (of flowers) having members in each whorl in groups of three.

2. Entomology. having three segments or parts.

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trimerous British  

/ ˈtrɪmərəs /

adjective

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

2. consisting of or having three parts

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trimerous Scientific  

/ trĭm′ər-əs /

1. Having three similar parts or segments.

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

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Etymology

Origin of trimerous

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

Example Sentences

Thus trimerous fuchsias and tetramerous jasmines may frequently be met with, and Turpin describes a tetramerous flower of Cobæa scandens.

From Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants by Masters, Maxwell T.

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.

From The Genus Pinus by Shaw, George Russell

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

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" by Various

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 Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" by Various

So in fuchsias, a very common deviation consists in a trimerous and rarely a dimerous symmetry of the flower.

From Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants by Masters, Maxwell T.