Entry 2 senses · 2 variants Webster, 1913 Procœlia · Pro·cœ·li·a · IPA n. n. pl. 01 n. Same as Procœle. pl. Procœliæ 1. Same as Procœle.(Anat.) See: Procœle 02 n. pl. A division of Crocodilia, including the true crocodiles and alligators, in which the dorsal vertebræ are concave in front. 1. A division of Crocodilia, including the true crocodiles and alligators, in which the dorsal vertebræ are concave in front.(Zool.)