The Collaborative International Dictionary of English v.0.48:

Noctuid \Noc"tu*id\, n. [From L. nox, noctis, night.] (Zool.)
   Any one of numerous moths of the family Noctuidae, or
   Noctuaelitae, as the cutworm moths, and armyworm moths; --
   so called because they fly at night. -- a. Of or pertaining
   to the noctuids, or family Noctuidae.
   [1913 Webster]

WordNet (r) 3.0 (2006):

noctuid
    n 1: usually dull-colored medium-sized nocturnal moth; the
         usually smooth-bodied larvae are destructive agricultural
         pests [syn: noctuid moth, noctuid, owlet moth]