The Collaborative International Dictionary of English v.0.48:

Pollack \Pol"lack\, n. [Cf. G. & D. pollack, and Gael. pollag a
   little pool, a sort of fish.] (Zool.)
   (a) A marine gadoid food fish of Europe (Pollachius
       virens). Called also greenfish, greenling, lait,
       leet, lob, lythe, and whiting pollack.
   (b) The American pollock; the coalfish.
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lythe \Lythe\ (l[imac]th), n. (Zool.)
   The European pollack; -- called also laith, and leet.
   [Scot.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lythe \Lythe\ (l[imac][th]), a. [See Lithe, a.]
   Soft; flexible. [Obs.] --Spenser.
   [1913 Webster] Lythonthriptic