n. [ Micro- + Gr. zy`mh leaven. ] (Biol.) A microorganism which is supposed to act like a ferment in causing or propagating certain infectious or contagious diseases; a pathogenic bacterial organism. [ obsolete ] [ 1913 Webster ]
n. [ Micro- + Gr. te`mnein to cut. ] An instrument for making very thin sections for microscopical examination. [ 1913 Webster ]