noun
: the quantity of radiant solar heat that is received normally at the outer layer of the earth's atmosphere and that has an average value of about 1.94 gram calories per square centimeter per minute
noun
: the quantity of radiant solar heat that is received normally at the outer layer of the earth's atmosphere and that has an average value of about 1.94 gram calories per square centimeter per minute
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012