a. [ Penta- + Gr. &unr_; part. ] 1. (Biol.) Divided into, or consisting of, five parts; also, arranged in sets, with five parts in each set, as a flower with five sepals, five petals, five, or twice five, stamens, and five pistils. [ 1913 Webster ]
2. (Zool.) Belonging to the Pentamera. [ 1913 Webster ]