Definition of patinae:
(n) :
The colour or incrustation which age and wear give to (mainly metallic) objects; especially, the green rust which covers works of art such as ancient bronzes, coins and medals.
(n) :
A green colour, tinted with grey, like that of bronze patina.
(adj) :
Of a green colour, tinted with grey, like that of bronze patina.
(n) :
(figurative) A gloss or superficial layer.
(n) :
(originally) A paten, flat type of dish.