Definitions for killer bee
Random House Webster's College Dictionary
Ref: African honeybee.
Ref: Africanized honeybee.
Origin of killer bee:
an investment banker who devises strategies to make a target company less attractive for takeover
Africanized bee, Africanized honey bee, killer bee, Apis mellifera scutellata, Apis mellifera adansonii(noun)
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
An Africanized honey bee.