round the clock
— Adverb
– English
～ without stopping; "she worked around the clock"
relativity theory
— Noun
– English
～ (physics) the theory that space and time are relative concepts rather than absolute concepts
reciprocal-inhibition therapy
— Noun
– English
～ a method of behavior therapy based on the inhibition of one response by the occurrence of another response that is mutually incompatible with it; a relaxation response might be conditioned to a stimulus that previously evoked anxiety
radiation therapy
— Noun
– English
～ (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance
radium therapy
— Noun
– English
～ the use of radium in radiation therapy
Reaumur thermometer
— Noun
– English
～ an alcohol thermometer calibrated in degrees Reaumur
reversing thermometer
— Noun
– English
～ a thermometer that registers the temperature in deep waters
resistance thermometer
— Noun
– English
～ thermometer that measures temperature by changes in the resistance of a spiral of platinum wire
real thing
— Noun
– English
～ informal usage attributing authenticity
Russian thistle
— Noun
– English
～ prickly bushy Eurasian plant; a troublesome weed in central and western United States
Raymond Thornton Chandler
— Noun
– English
～ United States writer of detective thrillers featuring the character of Philip Marlowe (1888-1959)
raw throat
— Noun
– English
～ inflammation of the fauces and pharynx
run-through
— Noun
– English
～ an uninterrupted rehearsal
run through
— Verb
– English
～ apply thoroughly; think through; "We worked through an example"
run through
— Verb
– English
～ use up (resources or materials); "this car consumes a lot of gas"; "We exhausted our savings"; "They run through 20 bottles of wine a week"
ring thrush
— Noun
– English
～ European thrush common in rocky areas; the male has blackish plumage with a white band around the neck
rule of thumb
— Noun
– English
～ a rule or principle that provides guidance to appropriate behavior
railroad ticket
— Noun
– English
～ a ticket good for a ride on a railroad train
return ticket
— Noun
– English
～ a ticket to a place and back (usually over the same route)
red tide
— Noun
– English
～ seawater that is discolored by large numbers of certain dinoflagellates that produce saxitoxin