Pentamerous definition

pĕn-tămər-əs
(biol.) Made up of five parts or divisions.
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(botany) In five parts; made up of five parts.

The Apocynaceae have pentamerous flowers.

adjective
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Having five similar parts.
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Having flower parts, such as petals, sepals, and stamens, in sets of five.
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Origin of pentamerous

  • From penta- +"Ž -merous.

    From Wiktionary