patina

1. A paten (a flat type of dish). (countable, uncountable)
2. The colour or incrustation which age and wear give to (chiefly metallic) objects; especially, the green rust which covers works of art such as ancient bronzes, coins and medals. (countable, uncountable)
3. A green colour tinted with grey, like that of bronze patina. (countable, uncountable)
4. A gloss or superficial layer. (countable, figuratively, uncountable) · He enjoys a patina of respect by the police, despite being an ex-criminal.

الجمع patinas