WordNet (r) 3.0 (2006):

Africanized bee
    n 1: a strain of bees that originated in Brazil in the 1950s as
         a cross between an aggressive African bee and a honeybee;
         retains most of the traits of the African bee; now spread
         as far north as Texas [syn: Africanized bee, Africanized
         honey bee, killer bee, Apis mellifera scutellata,
         Apis mellifera adansonii]