Source : Webster's Revised Unabridged Dictionary (1913)

Laminitis \Lam`i*ni"tis\, n. [NL. See {Lamina}, and {-itis}.]
   (Far.)
   Inflammation of the lamin[ae] or fleshy plates along the
   coffin bone of a horse; founder. --Youatt.

Source : WordNet®

laminitis
     n : inflammation of the laminated tissue that attaches the hoof
         to the foot of a horse [syn: {founder}]