\El"y*tron\ (?; 277), Elytrum \El"y*trum\ (-tr?m)n.; pl.
{Elytra}. [NL., fr. Gr. ?, fr. ? to roll round.] (Zo["o]l.)
(a) One of the anterior pair of wings in the Coleoptera and
    some other insects, when they are thick and serve only as
    a protection for the posterior pair. See {Coleoptera}.
(b) One of the shieldlike dorsal scales of certain annelids.
    See {Ch[ae]topoda}.