a. [ Gr. 'a priv. + &unr_; nuptial bed. ] (Bot.) Not furnished with shields or beds for the spores, as the thallus of certain lichens. [ 1913 Webster ]
a. [ Poly- + Gr. &unr_; a chamber. ] (Zool.) Many-chambered; -- applied to shells of Foraminifera and cephalopods. See Illust. of Nautilus. [ 1913 Webster ]