Source : Webster's Revised Unabridged Dictionary (1913)

Claymore \Clay"more`\, n. [Gael. claidheamhmor a broadsword;
   Gael. claidheamh sword + mor great, large. Cf. {Claymore}.]
   A large two-handed sword used formerly by the Scottish
   Highlanders.

Source : WordNet®

claymore
     n 1: a large double-edged broadsword; formerly used by Scottish
          Highlanders
     2: an anti-personnel land mine whose blast is aimed at the
        oncoming enemy [syn: {claymore mine}]