Frompenta- +‎-merous.

pentamerous (notcomparable)

1. (botany) In five parts; made up of five parts.

   The Apocynaceae havepentamerous flowers.

• monomerous(1),dimerous(2),trimerous(3),tetramerous(4),hexamerous(6),heptamerous(7),octamerous(8)

• pentamer
• pentameric
• pentamery

• Pentamerus

• “pentamerous”, inOneLook Dictionary Search.

• English terms prefixed with penta-
• English terms suffixed with -merous
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