tusk
     n 1: a hard smooth ivory colored dentine that makes up most of
          the tusks of elephants and walruses [syn: {ivory}]
     2: a long pointed tooth specialized for fighting or digging;
        especially in an elephant or walrus or hog
     v 1: stab or pierce with a horn or tusk; "the rhino horned the
          explorer" [syn: {horn}]
     2: remove the tusks of animals; "tusk an elephant" [syn: {detusk}]
Source: WordNet® 2.0