Etymology
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crampon (n.)

c. 1300, "metal bar bent at the ends for fastening," from Old French crampoun "cramp, brace, staple" (13c.), from Germanic (see cramp (n.1); also compare cramp (n.2)). As "apparatus used in the raising of heavy weights," mid-15c. By 1789 as "plate set with spikes, fastened to the foot to assist in walking on ice or climbing rock."

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Definitions of crampon

crampon (n.)
a hinged pair of curved iron bars; used to raise heavy objects;
Synonyms: crampoon
crampon (n.)
an iron spike attached to the shoe to prevent slipping on ice when walking or climbing;
Synonyms: crampoon / climbing iron / climber
From wordnet.princeton.edu