Noun
archaic smile (plural archaic smiles)
(art, sculpture, historical) A smiling facial expression commonly found on Greek statues of the Archaic period.
The sculptors had a clear idea of what a young man is, and embodied the archaic smile of good manners, the firm and springy step, the balance of the body, dignity, and youthful happiness. Source: Internet
These are large standing statues of naked youths, found in temples and tombs, with the kore as the clothed female equivalent, with elaborately dressed hair; both have the " archaic smile ". Source: Internet