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n. Abbr. rd
A unit expressing the rate of decay of radioactive material, equal to one million disintegrations per second, or one million becquerels.
[After Ernest Rutherford.]
1. (Biography) Ernest, 1st Baron. 1871–1937, British physicist, born in New Zealand, who discovered the atomic nucleus (1909). Nobel prize for chemistry 1908
2. (Biography) Dame Margaret. 1892–1972, British stage and screen actress. Her films include Passport to Pimlico (1949), Murder She Said (1962), and The VIPs (1963)
3. (Biography) Mark, original name William Hale White. 1831–1913, British novelist and writer, whose work deals with his religious uncertainties: best known for The Autobiography of Mark Rutherford (1881) and the novel The Revolution in Tanner's Lane (1887)
(Units) a unit of activity equal to the quantity of a radioactive nuclide required to produce one million disintegrations per second. Abbreviation: rd
[C20: named after Ernest Rutherford]
Ruth•er•ford(ˈrʌð ər fərd, ˈrʌθ-)
1. Daniel, 1749–1819, Scottish physician and chemist.
2. Ernest (1st Baron Rutherford of Nelson), 1871–1937, English physicist, born in New Zealand: Nobel prize for chemistry 1908.
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|Noun||1.||rutherford - a unit strength of a radioactive source equal to one million disintegrations per second|
radioactivity unit - a measure of radioactivity
|2.||Rutherford - British chemist who isolated nitrogen (1749-1819)|
|3.||Rutherford - British physicist (born in New Zealand) who discovered the atomic nucleus and proposed a nuclear model of the atom (1871-1937)|