Origin of pentamerouspenta- + -merous
- or pen·tam·er·al Having five similar parts.
- Having flower parts, such as petals, sepals, and stamens, in sets of five.
- pen·tam′er·ism pen·tam′er·y
- (botany) In five parts; made up of five parts.
- The Apocynaceae have pentamerous flowers.
From penta- +"Ž -merous.