radioelementn.

Brit.

/ˈreɪdɪəʊˌɛlᵻm(ə)nt/, U.S.

/ˈreɪdioʊˌɛləm(ə)nt/

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

Etymology: < radio- comb. form² + element n. Compare French radioélément (1906).

Science.

A radioactive chemical element; a radioactive isotope of an element.

ΘΚΠ

the world > matter > chemistry > elements and compounds > [noun] > elements > radioactive element

radioelement1903

1903 London, Edinb., & Dublin Philos. Mag. 6th Ser. 5 456 The non-separable activity of radium..consists only of α rays, the β radiation being less than 1/200 of the amount normally present. In this respect the three radio-elements are analogous.

1937 Discovery Mar. 65/2 A search for new radio elements of very short life whose existence is suspected.

1967 New Scientist 15 June 675/1 The main problem here is to ensure that dangerous long-lived radioelements are not inadvertently produced.

1991 J. N. Andrews in R. A. Downing & W. B. Wilkinson Appl. Groundwater Hydrol. xv. 253/1 The natural radioelements, U, Th, and K are widely distributed in crustal rocks.

Derivatives

ˌradioeleˈmental adj.

ΚΠ

1981 Nucl. Instruments & Methods 180 535/2 Concerning qualitative and quantitative radioelemental analysis, only few automatic high-accuracy programs are at present available.

2002 M. R. D. Seaward in P. L. Nimis et al. Monitoring with Lichens vii. 92 Additional information on the radioelemental content of several different lichen species.

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

单词	radioelement
释义	radioelementn. Brit. /ˈreɪdɪəʊˌɛlᵻm(ə)nt/, U.S. /ˈreɪdioʊˌɛləm(ə)nt/ Origin: Formed within English, by compounding. Etymons: radio- comb. form², element n. Etymology: < radio- comb. form² + element n. Compare French radioélément (1906). Science. A radioactive chemical element; a radioactive isotope of an element. ΘΚΠ the world > matter > chemistry > elements and compounds > [noun] > elements > radioactive element radioelement1903 1903 London, Edinb., & Dublin Philos. Mag. 6th Ser. 5 456 The non-separable activity of radium..consists only of α rays, the β radiation being less than 1/200 of the amount normally present. In this respect the three radio-elements are analogous. 1937 Discovery Mar. 65/2 A search for new radio elements of very short life whose existence is suspected. 1967 New Scientist 15 June 675/1 The main problem here is to ensure that dangerous long-lived radioelements are not inadvertently produced. 1991 J. N. Andrews in R. A. Downing & W. B. Wilkinson Appl. Groundwater Hydrol. xv. 253/1 The natural radioelements, U, Th, and K are widely distributed in crustal rocks. Derivatives ˌradioeleˈmental adj. ΚΠ 1981 Nucl. Instruments & Methods 180 535/2 Concerning qualitative and quantitative radioelemental analysis, only few automatic high-accuracy programs are at present available. 2002 M. R. D. Seaward in P. L. Nimis et al. Monitoring with Lichens vii. 92 Additional information on the radioelemental content of several different lichen species. This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022). < n.1903
随便看	postclitellian postclitic postclypeus postcoach postcode postcode lottery postcoded postcodes postcoding postcoenal postcognitive postcoital postcoitally postcoition postcold war postcoleridgean postcollege postcolleges postcollegiate postcolonial postcolonialism postcolonialist postcoloniality postcolumbian postcolumellar