eka-protactinium

短语

释义与例句

n.
  1. 1.

    unbitrium (Ubt), an unsynthesized chemical element with atomic number 123.

    不可数
  2. 2.

    unquadunium (Uqu), an unsynthesized element with atomic number 141.

    不可数

词源

From eka- + protactinium.

来源：wiktionary