reto - rock
- retort
- retort carbon
- retreat
- retreatment cell
- retroaction
- retrogradation
- retrograde metamorphism
- retrogressive accumulation
- retrogressive metamorphism
- retrogressive succession
- return flow
- revdinskite
- reverberation
- reverberatory furnace
- reversal
- reversal of geomagnetic field
- reversal of magnetization
- reversal of the earth's field
- reverse circulation
- reverse circulation flushing
- reverse fault
- reverse feedback
- reverse grading
- reverse mutation
- reverse position
- reverse rotary boring
- reverse thermoremanent magnetization
- reverse zoning
- reversed fault
- reversed fold
- reversed river
- reversibility
- reversible cell
- reversible chemical reaction
- reversible colloid
- reversible magnetization
- reversible motor
- reversible pendulum
- reversing thermometer
- reversion
