vapor
vay per
- n a visible suspension in the air of particles of some substance
- n the process of becoming a vapor
- A vision and experiment for 30 years, the mercury-vapor turbine is now finally developed to a point where it may yield the 50% or more increase in power-producing efficiency .
- In a moment long awaited by NASA scientists, the unmanned orbiter Cassini will pass through geysers of ice, water vapor and dust erupting from the southern pole of the 310-mile .
- The higher the vapor is heated, the greater the pressure which must be controlled and the work the steam can do.