n. [ Gr. &unr_;, &unr_;, ray + &unr_; bone. ] (Anat.) One of the bones at the base of a paired fin of a fish. [ 1913 Webster ]
n. [ Gr. &unr_;, &unr_;, a ray + &unr_; mouth. ] (Zool.) The mouth or anterior opening of a cœlenterate animal. [ 1913 Webster ]