Actinide
//ˈæktɪnaɪd//
"Actinide" in a Sentence (2 examples)
Einsteinium is the name for the element with atomic number 99 and is represented by the symbol Es. It is a member of the actinide group.
Nobelium is an actinide with element symbol No and atomic number 102.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.