Definition of frescos:
(n) :
(countable, painting) An artwork made by applying water-based pigment to wet or fresh lime mortar or plaster.
(n) :
(uncountable, painting) The technique used to make such an artwork.
(v) :
(ambitransitive) To paint using fresco.
(n) :
(countable) A cool, refreshing state of the air; coolness, duskiness, shade.