Nouns starting with R

• reverse — Noun – English ～ a relation of direct opposition; "we thought Sue was older than Bill but just the reverse was true"
• reverse lightning — Noun – English ～ atmospheric discharges (lasting 10 msec) bursting from the tops of giant storm clouds in blue cones that widen as they flash upward
• reverse Polish notation — Noun – English ～ a parenthesis-free notation for forming mathematical expressions in which each operator follows its operands
• reverse — Noun – English ～ an unfortunate happening that hinders or impedes; something that is thwarting or frustrating
• reverse hang — Noun – English ～ a hang with the arms extended in back
• reverse — Noun – English ～ (American football) a running play in which a back running in one direction hands the ball to a back running in the opposite direction
• reverse — Noun – English ～ the gears by which the motion of a machine can be reversed
• reverse gear — Noun – English ～ the gears by which the motion of a machine can be reversed
• reverse — Noun – English ～ the side of a coin or medal that does not bear the principal design
• reverse osmosis — Noun – English ～ (chemistry) a method of producing pure water; a solvent passes through a semipermeable membrane in a direction opposite to that for natural osmosis when it is subjected to a hydrostatic pressure greater than the osmotic pressure
• reversibility — Noun – English ～ the quality of being reversible in either direction
• reversible process — Noun – English ～ any process in which a system can be made to pass through the same states in the reverse order when the process is reversed
• reversible — Noun – English ～ a garment (especially a coat) that can be worn inside out (with either side of the cloth showing)
• reversion — Noun – English ～ (law) an interest in an estate that reverts to the grantor (or his heirs) at the end of some period (e.g., the death of the grantee)
• reversion — Noun – English ～ turning in the opposite direction
• reversion — Noun – English ～ a reappearance of an earlier characteristic
• reversion — Noun – English ～ a failure to maintain a higher state
• reversion — Noun – English ～ (genetics) a return to a normal phenotype (usually resulting from a second mutation)
• reversion — Noun – English ～ returning to a former state
• reversionary annuity — Noun – English ～ an annuity payable to one person in the event that someone else is unable to receive it

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