Rfn.

Brit.

/ˌɑːrˈɛf/, U.S.

/ˌɑrˈɛf/

Origin: Formed within English, by clipping or shortening. Etymon: rutherfordium n.

Etymology: Symbolic abbreviation for rutherfordium n.

Chemistry.

The element rutherfordium.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > specific elements > rutherfordium > [noun]

kurchatovium1967

rutherfordium1969

Rf1970

dubnium1994

1970 A. Ghiorso et al. in Physics Lett. B. 32 95 We have proposed that the element 104 be named rutherfordium. This name and the corresponding symbol Rf is used throughout this article.

1997 N.Y. Times (Nexis) 4 Mar. c6/5 Subject to confirmation by the union's members at a meeting in Geneva next August, these will be the names of the six new elements: Element 104, Rutherfordium (symbol Rf); Element 105, Dubnium (symbol Db) [etc.].

2001 M. Eagleson & W. Brewer tr. N. Wiberg Holleman–Wiberg Inorg. Chem. xxv. 1343 The isotope 257104Rf (alpha-emitter, half-life 4.5s) was detected by means of its daughter nucleus 253102No.

This is a new entry (OED Third Edition, March 2010; most recently modified version published online March 2022).

> as lemmas

RF n. (also rf) radio frequency; a radio-frequency signal.

1918 W. H. Eccles Wireless Telegr. & Teleph. (ed. 2) 471 The r.f. generator 1 and microphone 2 induce currents in circuit 5.

1930 Proc. IRE 18 1339 A relatively simple outfit is used comprising an r-f oscillator of variable frequency.

1936 R. S. Glasgow Princ. Radio Engin. xiii. 395 (in figure) A.V.C. connection to grid returns of R.F. amplifiers.

1956 Proc. CERN Sympos. 1 64/2 Synchrotron oscillations (if an rf is present) are damped.

2002 Surfer's Path June 109/1 (advt.) Removable RF welded wetsuit bag with changing mat.

R.F. n. Cartography = representative fraction n. at representative adj. and n. Compounds.

ΚΠ

1886 H. D. Hutchinson Mil. Sketching made Easy i. 12 A French map may show a scale of mètres, but to be generally useful to Englishmen it would be necessary to add to it a scale of yards with the same R.F.

1969 G. C. Dickinson Maps & Air Photographs vii. 102 In countries using the metric system scales of so many centimetres to a kilometre usually also give R.F.s with convenient round numbers.

1990 APT Bull. 22 122 The picture plane is drawn on the plan at the determined angle to the reference object with the plane touching the object at the point where the RF value was measured.

单词	rf
释义	Rfn. Brit. /ˌɑːrˈɛf/, U.S. /ˌɑrˈɛf/ Origin: Formed within English, by clipping or shortening. Etymon: rutherfordium n. Etymology: Symbolic abbreviation for rutherfordium n. Chemistry. The element rutherfordium. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > rutherfordium > [noun] kurchatovium1967 rutherfordium1969 Rf1970 dubnium1994 1970 A. Ghiorso et al. in Physics Lett. B. 32 95 We have proposed that the element 104 be named rutherfordium. This name and the corresponding symbol Rf is used throughout this article. 1997 N.Y. Times (Nexis) 4 Mar. c6/5 Subject to confirmation by the union's members at a meeting in Geneva next August, these will be the names of the six new elements: Element 104, Rutherfordium (symbol Rf); Element 105, Dubnium (symbol Db) [etc.]. 2001 M. Eagleson & W. Brewer tr. N. Wiberg Holleman–Wiberg Inorg. Chem. xxv. 1343 The isotope 257104Rf (alpha-emitter, half-life 4.5s) was detected by means of its daughter nucleus 253102No. This is a new entry (OED Third Edition, March 2010; most recently modified version published online March 2022). > as lemmas RF RF n. (also rf) radio frequency; a radio-frequency signal. Π 1918 W. H. Eccles Wireless Telegr. & Teleph. (ed. 2) 471 The r.f. generator 1 and microphone 2 induce currents in circuit 5. 1930 Proc. IRE 18 1339 A relatively simple outfit is used comprising an r-f oscillator of variable frequency. 1936 R. S. Glasgow Princ. Radio Engin. xiii. 395 (in figure) A.V.C. connection to grid returns of R.F. amplifiers. 1956 Proc. CERN Sympos. 1 64/2 Synchrotron oscillations (if an rf is present) are damped. 2002 Surfer's Path June 109/1 (advt.) Removable RF welded wetsuit bag with changing mat. extracted from Rn. R.F. R.F. n. Cartography = representative fraction n. at representative adj. and n. Compounds. ΚΠ 1886 H. D. Hutchinson Mil. Sketching made Easy i. 12 A French map may show a scale of mètres, but to be generally useful to Englishmen it would be necessary to add to it a scale of yards with the same R.F. 1969 G. C. Dickinson Maps & Air Photographs vii. 102 In countries using the metric system scales of so many centimetres to a kilometre usually also give R.F.s with convenient round numbers. 1990 APT Bull. 22 122 The picture plane is drawn on the plan at the determined angle to the reference object with the plane touching the object at the point where the RF value was measured. extracted from Rn. < n.1970 as lemmas
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