(redirected from pentamery)
Also found in: Thesaurus, Medical, Encyclopedia.


1. or pen·tam·er·al (-əl) Having five similar parts.
2. Having flower parts, such as petals, sepals, and stamens, in sets of five.

pen·tam′er·ism, pen·tam′er·y n.


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


(pɛnˈtæm ər əs)

1. consisting of or divided into five parts.
2. (of flowers) having five members in each whorl.
[1820–30; < New Latin pentamerus. See penta-, -merous]
pen•tam′er•ism, pen•tam′er•y, n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.pentamerous - divided into five parts; specifically, having each floral whorl consist of five (or a multiple of five) members; "pentamerous flowers"
phytology, botany - the branch of biology that studies plants
divided - separated into parts or pieces; "opinions are divided"
References in periodicals archive ?
For echinoderms, which arose from a bilateral ancestor, the evolution of pentamery and the fivefold NS is not well understood.
Gunnerales are sister to other core eudicots: implications for the evolution of pentamery.
In other groups a change from pentamery to tetramery by complete reduction of the median adaxial floral sector led to approximate polysymmetry (e.