radioisotopen.
/ˌreɪdɪəʊˈʌɪsətəʊp/, U.S. /ˌreɪdioʊˈaɪsəˌtoʊp/, /ˌreɪdioʊˈaɪsoʊˌtoʊp/ Science.
A radioactive isotope (cf. radionuclide n. at radio- comb. form2 2). Also: a chemical containing a radioisotope, a radiochemical.
ΘΚΠ
the world > matter > physics > atomic nucleus > radioactive isotope > [noun]
radioisotope1938
1938 Chem. Rev. 23 83 A natural radio-isotope of bismuth.
1946 Proc. Royal Soc. B. 133 169 The permeability [of erythrocytes] comes out clearly when radio isotopes in negligible quantity are added to blood.
1947 Amer. Jrnl. Physics 15 356/2 Radionuclide should replace radioelement and radioisotope in most applications.
1950 Times 8 May 4/4 Also being shown are the machines and methods used for the extraction and synthesis of C-14, a radio-isotope of carbon.
1976 Daily Colonist (Victoria, Brit. Columbia) 15 Apr. 5/5 A freshly fallen meteorite..contains radioisotopes which decay in a matter of days or weeks.
1993 M. W. Klemens Amphibians & Reptiles Connecticut vi. 215 Barbour..used radioisotope tagging to trace the movements of ten worm snakes in Kentucky.
2006 Chicago Tribune (Midwest ed.) 15 Jan. xiii. 8/2 If the abnormality is confined to just one parathyroid gland, a radioisotope (sestamibi) scan identifies and maps it.
This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022).
<
n.1938