Entry 1 sense Webster, 1913 Fissipalmate · Fis·si·pal·mate · IPA 01 a. Semipalmate and loboped, as a grebe's foot. See Illust. under Aves. 1. Semipalmate and loboped, as a grebe's foot. See Illust. under Aves.(Zool.) See: Aves