Grecism

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The style or spirit of Greek culture, art, or thought.
• noun The imitation of aspects of Greek culture, art, or thought.
• noun An idiom of the Greek language.

from The Century Dictionary.

• noun An idiom of the Greek language. Also Græcism, and rarely Greekism.

from the GNU version of the Collaborative International Dictionary of English.

• noun An idiom of the Greek language; a Hellenism.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a word or idiom of the Greek language used in another language, especially for literary effect
• noun the style, spirit or other characteristics of Greek arts and culture, or an imitation of that style etc