superactinide

English

Etymology

From super- +‎ actinide.

Pronunciation

• Audio (US):

  (file)

Noun

superactinide (plural superactinides)

1. (chemistry) Any of the undiscovered chemical elements from unbiunium (121) to perhaps unpentseptium (157), following the transactinides. These will presumably go below the actinides in the periodic table.