单词 | radiodating |
释义 | > as lemmasradiodating radiodating n. Brit. , U.S. any method of dating rocks, fossils, artefacts, etc., which depends on the measurement of the proportions of radioactive isotopes, e.g. radiocarbon and potassium–argon dating.ΘΚΠ the world > time > reckoning of time > chronology > [noun] > assignment to a time or dating > dating methods fluorine test1895 cross-dating1939 age dating1941 carbon–14 dating1950 radiocarbon dating1950 carbon dating1952 radiodating1962 radiometric dating1963 TL-dating1972 1962 A. Beiser Earth vi. 132 Recently, radio-dating studies have been made of meteorite fragments, giving age estimates as great as 4.5 billion years. 1965 Times 16 Nov. 10/3 Pottery is the commonest artifact discovered in ancient sites, but carbon-14 methods of radio-dating serve only for organic matter like wood or cloth. 1975 K. H. Goulding in Williams & Wilson Biologist's Guide to Princ. & Techniques Pract. Biochem. vi. 196 The assumptions made in radiodating are sweeping and hence palaeontologists and anthropologists who use this technique can only give very approximate dates to their samples. 1993 Jrnl. Petrol. 34 653 Radiodating shows that both types of leucogranite have identical ages of 372 ± 3 Ma. < as lemmas |
随便看 |
|
英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。