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actinide

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈæktɪˌnaɪd/US:USA pronunciation: respellingUSA pronunciation: respelling(ak′tə nīd′)


WordReference Random House Unabridged Dictionary of American English © 2026
ac•ti•nide  (ak′tə nīd′),USA pronunciation n. [Chem.]
  1. Chemistryany element of the actinide series.
  • actin- + -ide, on the model of lanthanide 1940–45

Collins Concise English Dictionary © HarperCollins Publishers::
actinide /ˈæktɪˌnaɪd/ n
  1. a member of the actinide seriesAlso called: actinon
Etymology: 19th Century: from actino- + -ide
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'actinide' also found in these entries (note: many are not synonyms or translations):
actinide series - actinium - actinon - transactinide - uranium

Forum discussions with the word(s) "actinide" in the title:


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