Connoisseur
Pronunciation : Con`nois*seur"
Part of Speech : n.
Etymology : [F. connaisseur, formerly connoisseur, fr. conna?tre to know, fr. L. cognoscere to become acquainted with; co- + noscere, gnoscere, to learn to know. See Know, amd cf. Cognizor.]
Definition : Defn: One well versed in any subject; a skillful or knowing person; a critical judge of any art, particulary of one of the fine arts. The connoisseur is "one who knows," as opposed to the dilettant, who only "thinks he knows." Fairholt.
Source : Webster's Unabridged Dictionary, 1913