roentgen ray
— Noun
– English
～ electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
roentgen
— Noun
– English
～ a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
roentgenium
— Noun
– English
～ a radioactive transuranic element
roentgenogram
— Noun
– English
～ a radiogram made by exposing photographic film to X rays; used in medical diagnosis
roentgenographic
— Adjective
– English
～ relating to or produced by roentgenography
roentgenography
— Noun
– English
～ radiography that uses X-rays to produce a roentgenogram
roentgenoscope
— Noun
– English
～ an X-ray machine that combines an X-ray source and a fluorescent screen to enable direct observation
rofecoxib
— Noun
– English
～ a Cox-2 inhibitor (trade name Vioxx) that relieves pain and inflammation without harming the digestive tract; voluntarily withdrawn from the market in 2004
Rogaine
— Noun
– English
～ a vasodilator (trade name Loniten) used to treat severe hypertension; one side effect is hirsutism so it is also sold (trade name Rogaine) as a treatment for male-patterned baldness
Rogation Day
— Noun
– English
～ one of the three days before Ascension Day; observed by some Christians as days of supplication
rogation
— Noun
– English
～ a solemn supplication ceremony prescribed by the church
Roger de Mortimer
— Noun
– English
～ English nobleman who deposed Edward II and was executed by Edward III (1287-1330)
Roger Eliot Fry
— Noun
– English
～ English painter and art critic (1866-1934)
Roger Bannister
— Noun
– English
～ English runner who in 1954 became the first person to run a mile in less than four minutes (born in 1929)
Roger Bacon
— Noun
– English
～ English scientist and Franciscan monk who stressed the importance of experimentation; first showed that air is required for combustion and first used lenses to correct vision (1220-1292)
Roger Fry
— Noun
– English
～ English painter and art critic (1866-1934)
Rogers
— Noun
– English
～ United States dancer and film actress who partnered with Fred Astaire (1911-1995)
Rogers
— Noun
– English
～ United States psychologist who developed client-centered therapy (1902-1987)
Rogers
— Noun
– English
～ United States humorist remembered for his homespun commentary on politics and American society (1879-1935)
Roget
— Noun
– English
～ English physician who in retirement compiled a well-known thesaurus (1779-1869)