Source : Webster's Revised Unabridged Dictionary (1913)

Logotype \Log"o*type\, n. [Gr. ? word + -type.] (Print.)
   A single type, containing two or more letters; as, [ae],
   [AE], [filig], [fllig], [ffllig], etc.; -- called also
   {ligature}.

Source : WordNet®

logotype
     n : a company emblem or device [syn: {logo}]