Coleoptera (pron.: /koʊliːˈɒptərə/) is an order of insects commonly
called beetles. The word "coleoptera" is from the Greek κολεός, koleos,
meaning "sheath"; and πτερόν, pteron, meaning "wing", thus "sheathed
wing". The reason for the name is that most beetles have two pairs of
wings, the front pair, the "elytra", being hardened and thickened into a
sheath-like, or shell-like, protection for the rear pair, and for the
rear part of the beetle's body
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