Definitions

1. noun

A botanical term referring to a flower or plant with five stamens, or a group of species characterized by this trait.

“The pentandria family of flowers includes many species native to tropical regions.”

2. noun

A subdivision or order in the Linnaean classification system for plants, referring to flowering plants with five stamens.

“The Linnaean classification system includes various orders, such as pentandria, which is a distinct group of flowering plants.”