coolth

noun

1. (uncountable, usually)The state of being cool, temperature-wise; coolness.

   “Froid: m. Cold, cooth^([sic]); coldneſſe, chilneſſe.”

   “In the evening my father and Mrs Thrale seated themselves out of doors, just before the Blue-room windows, for coolth and chat; […]”

   “Through the speckled shadow of the great deodar-forests […] and back into the woodlands’ coolth again […]”

   “The water pushed large blocks of tepid air about around his chair, giving the faint illusion of freshness and coolth.”

   “This they do, not only convectively by passing cooler air over the skins of building occupants, but also using radiant coolth.”