brill
 oxford
 views  updated Jun 08 2018brill  / bril/ •
n. a European flatfish (Scophthalmus rhombus, family Scophthalmidae) that resembles a turbot.
 The Oxford Pocket Dictionary of Current English 
   brill
 oxford
 views  updated May 11 2018brill flat-fish, 
Scophthalmus rhombus, having brilliant spots. XV.
 Also 
brell, 
prylle XV, 
prill XVII, 
pearl XVII–XIX, of obscure connections and unkn. orig.
  The Concise Oxford Dictionary of English Etymology T. F. HOAD