"Having eight stamens", Early 19th cent.; earliest use found in William Roxburgh (1751–1815), botanist. From scientific Latin octandrus (as a specific epithet in Linnaeus Species Plantarum I. 391; from classical Latin octō- + -ανδρος, after Octandria) + -ous. Compare French octandre, adjective.[octandrous etymology, octandrous origin, 英语词源]