DuckCorp Dico

Found one definition

1.                 From en.wiktionary.org:
                   
   
   
                   
                     
   
   ** English
   
   *** Noun
   [en-noun]
   
    1. [en] .
    2. * {{ quote-text | en | year=2011 | author=Stanley Freese | title=Windmills and Millwrighting | page=40 | publisher=Cambridge University Press
   |passage=Old post-mills were turned or 'luffed' into the wind by a pole
   variously called the tail-pole, TAIL-BEAM, turning-beam, or tiller-beam.}}