The Collaborative International Dictionary of English v.0.48:

Bowknot \Bow"knot`\, n.
   A knot in which a portion of the string is drawn through in
   the form of a loop or bow, so as to be readily untied.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bowknot
    n 1: a knot with two loops and loose ends; used to tie shoelaces
         [syn: bow, bowknot]