tech·​ne·​tium | \ tek-ˈnē-sh(ē-)əm How to pronounce technetium (audio) \

Definition of technetium

: a radioactive metallic element obtained especially from nuclear fuel as a product of uranium fission and used as a diagnostic radiopharmaceutical — see Chemical Elements Table

Examples of technetium in a Sentence

Recent Examples on the Web Still, Lawrence’s cyclotrons allowed element hunters to take trillions of shots, and by 1937 one of his devices had created technetium (element No. Neima Jahromi, The New Yorker, 27 Dec. 2019 Like all elements first born in cyclotrons, technetium was radioactive. Neima Jahromi, The New Yorker, 27 Dec. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'technetium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of technetium

circa 1946, in the meaning defined above

History and Etymology for technetium

Greek technētós "artificial" (verbal adjective of technáomai, technâsthai "to make with skill, contrive cunningly," verbal derivative of téchnē "art, skill, proficiency in an art or craft, (in plural) wiles, cunning") + -ium; so named because it was the first element to be synthesized artificially — more at technical entry 1

Note: The element was named by the Italian mineralogist Carlo Perrier (1886-1948) and the Italian-American physicist Emilio Segrè (1905-89), who had earlier isolated isotopes; see C. Perrier and E. Segrè, "Technetium: the element of atomic number 43," Nature, vol. 159, no. 4027, January 4, 1947, p. 24.

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The first known use of technetium was circa 1946

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Cite this Entry

“Technetium.” Dictionary, Merriam-Webster, Accessed 27 Jan. 2022.

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tech·​ne·​tium | \ tek-ˈnē-sh(ē-)əm How to pronounce technetium (audio) \

Medical Definition of technetium

: a metallic element that is obtained by bombarding molybdenum with deuterons or neutrons and in the fission of uranium and that is used in medicine in the preparation of radiopharmaceuticals symbol Tc — see pertechnetate Chemical Elements Table

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