GNU Collaborative International Dictionary of English

Found one definition

1.       
   Blay (), n. [AS. blǣge, fr. blǣc, bleak, white; akin to Icel. bleikja, OHG. bleicha, G. bleihe. See Bleak, n. & a.] (Zool.) A fish. See Bleak, n.
   
   [1913 Webster]