Definition of "pentamerous" []

• Having five similar parts. (adjective)
• Having flower parts, such as petals, sepals, and stamens, in sets of five, as in the geranium. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Adephagous: belonging to the Adephaga: pentamerous, predatory, terrestrial beetles with filiform antennae and predatory habits: see hydradephagous."
• "Hydradephaga; - ous: applied to aquatic, predatory pentamerous beetles with filiform antennae: see adephagous."
• "Thus, in both _Lilium lancifolium_ and _L. auratum_ the writer has frequently met with pentamerous flowers."