Protoactinium
[proh-toh-ak-tin-ee-uh m] /ˌproʊ toʊ ækˈtɪn i əm/
noun, Chemistry.
1.
protactinium.
protoactinium
/ˌprəʊtəʊækˈtɪnɪəm/
noun
1.
the former name of protactinium
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[proh-toh-al-gong-kee-uh n, -kwee-uh n] /ˌproʊ toʊ ælˈgɒŋ ki ən, -kwi ən/ noun 1. the unattested parent language from which the Algonquian languages are descended.
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