Entry 1 sense Webster, 1913 Capitibranchiata · Cap·i·ti·bran·chi·a·ta · IPA 01 n. pl. A division of annelids in which the gills arise from or near the head. See Tubicola. 1. A division of annelids in which the gills arise from or near the head. See Tubicola.(Zool.) See: Tubicola