Underwing

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From WordNet (r) 2.0 [wn]:

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