a. [ Gr. 'a priv. + &unr_;. &unr_;. a short cloak. ] (Zool.) Not possessing a mantle; -- said of certain gastropods. [ 1913 Webster ]
a. [ L. chlamydatus dressed in a military cloak. See Chlamys. ] (Zool.) Having a mantle; -- applied to certain gastropods. [ 1913 Webster ]