Mantis :: Mantis (n.) Any one of numerous species of voracious orthopterous insects of the genus Mantis, and allied genera. They are remarkable for their slender grotesque forms, and for holding their stout anterior legs in a manner suggesting hands folded in prayer. The common American species is M. Carolina..
Mantispid :: Mantispid (n.) Any neuropterous insect of the genus Mantispa, and allied genera. The larvae feed on plant lice. Also used adjectively. See Illust. under Neuroptera..
Mantissa :: Mantissa (n.) The decimal part of a logarithm, as distinguished from the integral part, or characteristic..