Entry 1 sense Webster, 1913 Heptamerous /hĕptăʹmərəs/ · Hep·tam·er·ous · IPA /hɛpˈtæməɹəs/ 01 a. Consisting of seven parts, or having the parts in sets of sevens. 1. Consisting of seven parts, or having the parts in sets of sevens.(Bot.)