Eka-protactinium

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    unbitrium (Ubt), an unsynthesized chemical element with atomic number 123. uncountable
  2. 2
    unquadunium (Uqu), an unsynthesized element with atomic number 141. uncountable

Etymology

From eka- + protactinium.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.