Entry 2 senses · 2 variants Webster, 1913 Fissiped · Fis·si·ped · IPA a. n. 01 a. Having the toes separated to the base. [See Aves.] 1. Having the toes separated to the base. [See Aves.](Zool.) See: Aves 02 n. One of the Fissipedia. 1. One of the Fissipedia.(Zool.)