Daily Almanac for
May 27, 2012
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Dictionary


pro•to•ac•tin•i•um



Pronunciation: (prō"tō-ak-tin'ē-um), [key]
—n. Chem.
protactinium.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

proto-Proto-Algonquian
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