elytroid

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elytron

el·y·tron

E0099000 (ĕl′ĭ-trŏn′)n. pl. el·y·tra (-trə) Either of the leathery or chitinous forewings of a beetle or a related insect, serving to encase the membranous hind wings used in flight. Also called wing case.
[New Latin, from Greek elutron, sheath; see wel- in Indo-European roots.]
el′y·troid′ (-troid′) adj.

el•y•troid

(ˈɛl ɪˌtrɔɪd)

adj. resembling an elytron. [1860–65]