[ pen-tam-er-uh s ]
/ pɛnˈtæm ər əs /


consisting of or divided into five parts.
Botany. (of flowers) having five members in each whorl.

Origin of pentamerous

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

Related forms

pen·tam·er·ism, pen·tam·er·y, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pentamerous

British Dictionary definitions for pentamerous


/ (pɛnˈtæmərəs) /


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

Derived Forms

pentamerism, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012