protactinium

From proto- +‎ actinium.

• (UK) IPA^(key): /ˌpɹəʊ.tækˈtɪn.i.əm/
• (US) enPR: prō"tăktĭ'nēəm, IPA^(key): /ˌpɹoʊ.tækˈtɪn.i.əm/

• Audio (US):

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• Audio (General American):

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protactinium (uncountable)

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

It was called protoactinium until 1949. Then the name was shortened.

• protoactinium (dated)

• eka-protactinium

• actinium

• protaktinium

From proto- +‎ actinium.

protactinium n (singular definite protactiniummet, not used in plural form)

1. protactinium

• “protactinium” in Den Danske Ordbog

• IPA^(key): /ˌproː.tɑkˈti.ni.ʏm/

• Audio:

  (file)

protactinium n (uncountable)

1. protactinium

• IPA^(key): /pʁɔ.tak.ti.njɔm/

protactinium m (uncountable)

1. protactinium

• “protactinium”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

• (Classical Latin) IPA^(key): [proː.takˈtiː.ni.ũː]
• (modern Italianate Ecclesiastical) IPA^(key): [pro.t̪akˈt̪iː.ni.um]

prōtactīnium n (genitive prōtactīniī); second declension

1. protactinium

Second-declension noun (neuter).