dimerous

American  

[dim-er-uhs] / ˈdɪm ər əs /

adjective

1. consisting of or divided into two parts.

2. Botany. (of flowers) having two members in each whorl.

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dimerous British  

/ ˈdɪmərəs /

adjective

1. consisting of or divided into two segments, as the tarsi of some insects

2. (of flowers) having their floral parts arranged in whorls of two

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dimerous Scientific  

/ dĭm′ər-əs /

1. Consisting of two parts or segments, as the tarsus in certain insects.

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

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Other Word Forms

• dimerism noun
• undimerous adjective

Etymology

Origin of dimerous

1820–30; < New Latin dimerus < Greek dimerḗs bipartite. See di- ¹, -merous

Example Sentences

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.

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

Darwin afterwards gave a doubtful explanation of this, and concluded that the ovary is dimerous.

From More Letters of Charles Darwin — Volume 2 by Darwin, Francis, Sir

Leaves oblong or oval with narrowed base; flowers mostly dimerous; seeds short-oblong, with 6 or 7 longitudinal lines and 10–12 crossbars.—Ill. and southwestward.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa