Fthm

1 definition found

From WordNet (r) 2.0 [wn]:

  fthm
       n 1: a linear unit of measurement (equal to 6 feet) for water
            depth [syn: {fathom}]
       2: (mining) a unit of volume (equal to 6 cubic feet) used in
          measuring bodies of ore [syn: {fathom}]