Entry 1 sense Webster, 1913 Cirrobranchiata · Cir·ro·bran·chi·a·ta · IPA 01 n. pl. A division of Mollusca having slender, cirriform appendages near the mouth; the Scaphopoda. 1. A division of Mollusca having slender, cirriform appendages near the mouth; the Scaphopoda.(Zool.)