The Collaborative International Dictionary of English v.0.48:

Hymenopter \Hy`me*nop"ter\, n. [Cf. F. hym['e]nopt[`e]re.]
   (Zool.)
   One of the Hymenoptera.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hymenopter
    n 1: insects having two pairs of membranous wings and an
         ovipositor specialized for stinging or piercing [syn:
         hymenopterous insect, hymenopteran, hymenopteron,
         hymenopter]