(click for larger image in new window) n.
pl.el·y·tra (-trə) Either of the leathery or chitinous forewings of a beetle or a related insect, serving to encase the thin, membranous hind wings used in flight. Also called wing case.
[New Latin, from Greek elutron, sheath; see wel-2 in Indo-European roots.] el'y·troid' (-troid') adj.