underwing

2 definitions found

underwing - Collaborative International Dictionary of English v.0.48 :

  Underwing \Un"der*wing`\, n.
     1. (Zool.) One of the posterior wings of an insect.
        [1913 Webster]
  
     2. (Zool.) Any one of numerous species of noctuid moths
        belonging to Catocala and allied genera, in which the
        hind wings are banded with red and black or other
        conspicuous colors. Many of the species are called red  underwing
        .
        [1913 Webster]

underwing - WordNet (r) 2.1 (2005) :

  underwing
      n 1: moth having dull forewings and brightly colored hind wings