Graecism

Concise Oxford English Dictionary © 2008 Oxford University Press:
Graecism /ˈgriːsɪz(ə)m, ˈgrʌɪ-/ (also Grecism)

▶noun

• 1 a Greek idiom.

• 2 the qualities typical of Greece and the Greeks, especially in a work of art.

– derivatives
Graecize (or Graecise) verb.

– origin C16: from Fr. grécisme or med. L. Graecismus, from Graecus (see Greek).