(Old A.S. faethm, “bosom,” or the outstretched arms), a span of six feet (Acts 27:28). Gr. orguia (from orego, “I stretch”), the distance between the extremities of both arms fully stretched out.
Fathom
1 verse
Acts
Acts 27:28
And sounded, and found it twenty fathoms: and when they had gone a little further, they sounded again, and found it fifteen fathoms.
From Easton's Bible Dictionary
Matthew George Easton, 1897
From Smith's Bible Dictionary
William Smith, 1884
[WEIGHTS AND MEASURES AND MEASURES]