Evaporation
EVAPORA'TION, noun The conversion of a fluid into vapor specifically lighter than the atmospheric air. evaporation is increased by heat and is followed by cold. It is now generally considered as a solution in the atmosphere.
1. The act of flying off in fumes; vent; discharge.
2. In pharmacy, the operation of drawing off a portion of a fluid in steam, that the remainder may be of a greater consistence, or more concentrated.