DICTIONARY OF AUTOMOTIVE TERMS - "Rh"

RH
  1. Acronym for right hand, as in RH drive. For all vehicles, left and right are from the perspective of sitting in the forward-facing Driver's seat.
  2. Acronym for Relative humidity.
RHC
Acronym for Reactive hydrocarbons
RHD
Acronym for right-hand drive.
Rheostat
  1. A resistor with variable resistance, e.g., the switch that dims the dash lights.
  2. A variable resistor used to control blower speeds.
Rhodium
A silver-white noble metal in the platinum family; atomic number 45, atomic weight 102.905; used in thermocouples and, together with other platinum metals, as a catalyst in catalytic converters.
Rhr
Acronym for Rear head restraints.