The Collaborative International Dictionary of English v.0.48:

Homoptera \Ho*mop"te*ra\, n. pl. [NL., fr. Gr. ? the same, like
   + ? wing.] (Zool.)
   A suborder of Hemiptera, in which both pairs of wings are
   similar in texture, and do not overlap when folded, as in the
   cicada. See Hemiptera.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Homoptera
    n 1: plant lice (aphids); whiteflies; cicadas; leafhoppers;
         plant hoppers; scale insects and mealybugs; spittle insects
         [syn: Homoptera, suborder Homoptera]