Source : Webster's Revised Unabridged Dictionary (1913)

Criticaster \Crit"ic*as`ter\ (kr[i^]t"[i^]k*[a^]s`t[til]r), n.
   A contemptible or vicious critic.

         The rancorous and reptile crew of poeticules, who
         decompose into criticasters.             --Swinburne.