Atticism
From BiblePortal Wikipedia
Webster's Dictionary [1]
(1): (n.) The style and idiom of the Greek language, used by the Athenians; a concise and elegant expression.
(2): (n.) A favoring of, or attachment to, the Athenians.
The Nuttall Encyclopedia [2]
A pure and refined style of expression in any language, originally the purest and most refined style of the ancient literature of Greece.