protactiniumUK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˌprəʊtækˈtɪnɪəm/US:USA pronunciation: respellingUSA pronunciation: respelling(prō′tak tin′ē əm) No thesaurus entry found for 'protactinium' ✓ See the definition of "protactinium" in our monolingual dictionaryRecent forum discussions about thesaurus entries: No thread for "protactinium"
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