psy·chrom·e·ter 
(sī-krŏmĭ-tər)
(sī-krŏmĭ-tər)n.
An instrument that uses the difference in readings between two thermometers, one having a wet bulb and the other having a dry bulb, to measure the moisture content or relative humidity of air.
- reverencer
- reverend
- reverent
- reverential
- reverentially
- reverently
- reverie
- revers
- reversal
- reverse
- reverse acquisition
- reverse appliqué
- reverse discrimination
- reverse dive
- reverse engineer
- reverse engineering
- reverse fault
- reverse field
- reverse layup
- reversely
- reverse merger
- reverse mortgage
- reverse (one's) field
- reverse one's field
- reverse osmosis