Medical Definition of Puberty, precocious. Puberty, precocious: Precocious puberty is the unusually early development of secondary sexual features. The onset of sexual maturation in a girl before age 8 or a boy before age 9 is usually considered to be precocious puberty. Last Editorial Review: 7/1/2016.
Evaporative coolers lower the temperature of air using the principle of evaporative cooling, unlike typical air conditioning systems which use vapor-compression refrigeration or absorption refrigerator. Evaporative cooling is the addition of water vapor into air, which causes a lowering of the temperature of the air.
Boiling Evaporation and Condensation. Evaporation is the change of phase from liquid to gas. Evaporation occurs only at the surface of the water and at every temperature. However, evaporation is directly proportional to the temperature, increasing in the temperature increasing in the rate of evaporation.