Source : Webster's Revised Unabridged Dictionary (1913)

Hectometer \Hec"to*me`ter\, Hectometre \Hec"to*me`tre\, n. [F. ?
   hectom[`e]tre, fr. Gr. ? hundred + F. m[`e]tre a meter.]
   A measure of length, equal to a hundred meters. It is
   equivalent to 328.09 feet.

Source : WordNet®

hectometre
     n : a metric unit of length equal to 100 meters [syn: {hectometer},
          {hm}]