The Collaborative International Dictionary of English v.0.48:
Beetle \Bee"tle\, n. [OE. bityl, bittle, AS. b[imac]tel, fr.
b[imac]tan to bite. See Bite, v. t.]
Any insect of the order Coleoptera, having four wings, the
outer pair being stiff cases for covering the others when
they are folded up. See Coleoptera.
Beetle mite (Zool.), one of many species of mites, of the
family Oribatid[ae], parasitic on beetles.
Black beetle, the common large black cockroach (Blatta