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.
evaporation: Noun: process by which liquid water becomes water vapor. Encyclopedic Entry: evaporation: gas: Noun: state of matter with no fixed shape that will fill any container uniformly. Gas molecules are in constant, random motion. high-pressure system: Noun: weather pattern characterized by high air pressure, usually as a result of cooling.