pentamerous

American  

[pen-tam-er-uhs] / pɛnˈtæm ər əs /

adjective

1. consisting of or divided into five parts.

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

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pentamerous British  

/ pɛnˈtæmərəs /

adjective

1. consisting of five parts, esp (of flowers) having the petals, sepals, and other parts arranged in groups of five

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Other Word Forms

• pentamerism noun
• pentamery noun

Etymology

Origin of pentamerous

From the New Latin word pentamerus, dating back to 1820–30. See penta-, -merous

Example Sentences

In the large tropical genus Croton a pentamerous calyx and corolla are generally present, the stamens are often very numerous, and the female flower has three carpels.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 8 "Ethiopia" to "Evangelical Association" by Various

Adephagous: belonging to the Adephaga: pentamerous, predatory, terrestrial beetles with filiform antennae and predatory habits: see hydradephagous.

From Explanation of Terms Used in Entomology by Smith, John. B.

To take an example, the group Pseudostrobus, characterized by pentamerous leaf-fascicles, appears in many systems.

From The Genus Pinus by Shaw, George Russell

Thus the formula S5P5St5C5 means that the flower is perfect, and has pentamerous symmetry, the whorls being isomerous.

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

Thus, in both Lilium lancifolium and L. auratum the writer has frequently met with pentamerous flowers.

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