GNU Collaborative International Dictionary of English

Found one definition

1.       
   Eyot (īˈŏt or āt), n. [Ey (AS. īg or Icel. ey) + F. dim. termination -ot; cf. AS. īgeoð.  See Island, and cf. Ait.] A little island in a river or lake. See Ait. [Written also ait, ayt, ey, eyet, and eyght.]  Blackstone.
   
   [1913 Webster]