the GNU version of the Collaborative International Dictionary of English
adj. Divided into, or consisting of, five parts; also, arranged in sets, with five parts in each set, as a flower with five sepals, five petals, five, or twice five, stamens, and five pistils.
adj. Belonging to the Pentamera.
The Century Dictionary and Cyclopedia
Five-parted; five-jointed; composed or consisting of five parts or five sets of similar parts.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. divided into five parts; specifically, having each floral whorl consist of five (or a multiple of five) members
Word Usage
"Adephagous: belonging to the Adephaga: pentamerous, predatory, terrestrial beetles with filiform antennae and predatory habits: see hydradephagous."