radio-atomn.

Brit.

/ˈreɪdɪəʊˌatəm/, U.S.

/ˈreɪdioʊˌædəm/

Origin: Formed within English, by compounding. Etymons: radio- comb. form², atom n.

Etymology: < radio- comb. form² + atom n.

Physics.

A radioactive atom; an atom of a radionuclide.

ΘΚΠ

the world > matter > chemistry > atomic chemistry > [noun] > atoms > specific types of atoms

functional group1892

species1895

hetero-atom1900

radio-atom1905

isobar1918

donor1927

impurity atom1939

nuclide1947

strong collider1968

1905 E. Rutherford in Philos. Trans. (Royal Soc.) A. 204 208 There is now little doubt that the γ rays are electromagnetic pulses, similar to X rays, generated at the moment of the sudden expulsion of the β particle from the radio-atom.

1947 Instruments 20 712/1 The qualities which make radio~atoms (‘hot’ atoms) useful to science and industry make them hazardous to handle.

1996 Radioactivities (Univ. Brit. Columbia Radiation Safety Office) 7 iv. 1 The presence of the newly formed ion often initiates self-decomposition of the molecule that contained the radioatom.

Derivatives

ˌradio-aˈtomic adj. rare.

ΚΠ

1920 Public Opinion 16 Apr. 373/3 Man may harness the awful forces of radio-atomic energy.

1943 Astounding Sci.-Fiction Oct. 101/2 Why did I put your radioatomic brain in your stomach?

This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022).

单词	radio-atom
释义	radio-atomn. Brit. /ˈreɪdɪəʊˌatəm/, U.S. /ˈreɪdioʊˌædəm/ Origin: Formed within English, by compounding. Etymons: radio- comb. form², atom n. Etymology: < radio- comb. form² + atom n. Physics. A radioactive atom; an atom of a radionuclide. ΘΚΠ the world > matter > chemistry > atomic chemistry > [noun] > atoms > specific types of atoms functional group1892 species1895 hetero-atom1900 radio-atom1905 isobar1918 donor1927 impurity atom1939 nuclide1947 strong collider1968 1905 E. Rutherford in Philos. Trans. (Royal Soc.) A. 204 208 There is now little doubt that the γ rays are electromagnetic pulses, similar to X rays, generated at the moment of the sudden expulsion of the β particle from the radio-atom. 1947 Instruments 20 712/1 The qualities which make radio~atoms (‘hot’ atoms) useful to science and industry make them hazardous to handle. 1996 Radioactivities (Univ. Brit. Columbia Radiation Safety Office) 7 iv. 1 The presence of the newly formed ion often initiates self-decomposition of the molecule that contained the radioatom. Derivatives ˌradio-aˈtomic adj. rare. ΚΠ 1920 Public Opinion 16 Apr. 373/3 Man may harness the awful forces of radio-atomic energy. 1943 Astounding Sci.-Fiction Oct. 101/2 Why did I put your radioatomic brain in your stomach? This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022). < n.1905
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