English Explanatory Dictionary

protactinium

English dictionary entry

Meanings

noun
  1. A chemical element (symbol Pa) with atomic number 91. A dense, silvery-gray actinide metal.

Pronunciation

/ˌpɹəʊ.tækˈtɪn.i.əm/ prō"tăktĭ'nēəm /ˌpɹoʊ.tækˈtɪn.i.əm/ LL-Q1860 (eng)-Vininn126-protactinium.wav LL-Q1860 (eng)-Naomi Persephone Amethyst (NaomiAmethyst)-protactinium.wav

Word forms

protactinium

Etymology

From proto- + actinium.

Synonyms

protoactinium

Related words

actinium

Derived words

diprotactinium eka-protactinium protactinate
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