septenate,a.Bot.|ˈsɛptɪnət| [f. L. septēnī seven each + -ate2.] Growing in sevens, having seven divisions, heptamerous. 1830Lindley Nat.Syst.Bot. 115 Leaves..compound, quinate or septenate.1861Bentley Man.Bot. 171 Septenate leaf of the Horse-chestnut.