B-52

from WordNet (r) 3.0 (2006)

B-52
    n 1: United States military aircraft; B- stands for bomber

from The Collaborative International Dictionary of English v.0.48

B-52 \B-52\ n.
   A large long-range bomber airplane of the U. S. military
   aircraft fleet; B- stands for bomber. It has the capability
   of delivering nuclear weapons.
   [WordNet 1.5 +PJC]