Hal"i*but (h&obreve;l"&ibreve;*bŭt; 277), n. [OE.
hali holy + but,
butte, flounder; akin to D. bot, G. butte; cf. D. heilbot, G. heilbutt. So named as being eaten on holidays. See Holy, Holiday.]
(Zoöl.) A large, northern, marine flatfish
(Hippoglossus vulgaris), of the family Pleuronectidæ. It often grows very large, weighing more than three hundred pounds. It is an important food fish. [Written also holibut.]