Source : Webster's Revised Unabridged Dictionary (1913)

Linotype \Lin"o*type\, n. [See {Line}; {Type}.] (Print.)
   (a) A kind of typesetting machine which produces castings,
       each of which corresponds to a line of separate types. By
       pressing upon keys like those of a typewriter the
       matrices for one line are properly arranged; the
       stereotype, or slug, is then cast and planed, and the
       matrices are returned to their proper places, the whole
       process being automatic.
   (b) The slug produced by the machine, or matter composed in
       such lines. -- {Lin"o*typ`ist}, n.

Source : WordNet®

Linotype
     n : a typesetting machine operated from a keyboard that casts an
         entire line as a single slug of metal [syn: {Linotype
         machine}]