n. a genus of widely distributed semiaquatic herbs with minute greenish-yellow apetalous flowers.
‖n.[ L., a plaster, a patch, from Gr. &unr_;&unr_;&unr_;&unr_; a bandage, compress. ] (Anat.) The thickened posterior border of the corpus callosum; -- so called in allusion to its shape. [ 1913 Webster ]