hairy-legged vampire bat: similar in size and habits to Desmodus rotundus; of tropical America including southern California and Texas
vampire bat: any of various tropical American bats of the family Desmodontidae that bite mammals and birds to feed on their blood
weak interaction: (physics) an interaction between elementary particles involving neutrinos or antineutrinos that is responsible for certain kinds of radioactive decay; mediated by intermediate vector bosons