Source : Webster's Revised Unabridged Dictionary (1913)

Caplin \Cap"lin\, n.
   See {Capelin}.

Caplin \Cap"lin\, Capling \Cap"ling\, n.
   The cap or coupling of a flail, through which the thongs pass
   which connect the handle and swingel. --Wright.

Source : WordNet®

caplin
     n : very small northern fish; forage for sea birds and marine
         mammals and other fishes [syn: {capelin}, {capelan}]