Source : Webster's Revised Unabridged Dictionary (1913)

Crampon \Cram"pon\ (kr[a^]m"p[o^]n), n. [F. See {Crampoons}.]
   (Bot.)
   An a[eum]rial rootlet for support in climbing, as of ivy.

Source : WordNet®

crampon
     n 1: a hinged pair of curved iron bars; used to raise heavy
          objects [syn: {crampoon}]
     2: an iron spike attached to the shoe to prevent slipping on
        ice when walking or climbing [syn: {crampoon}, {climbing
        iron}, {climber}]