“Cognoscenti (plural noun): Individuals having authoritative knowledge of a field or subject, especially in the arts; informed or expert specialists. Singular: cognoscente.
‘Some of the illustrations will be revelations even to the cognoscenti. The soaring drama of the Galleria Vittorio Emanuele II, Milan, for example, is an extraordinary fish-eye photo.’ J. Mourdant Crook, Times Literary Supplement.”
Excerpted from: Grambs, David. The Random House Dictionary for Writers and Readers. New York: Random House, 1990.