Definition of Th in English :
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Th
see synonyms of thNoun
2. atomic number 90, th, thorium
a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands
WordNet Lexical Database for English. Princeton University. 2010.
Th
see synonyms of thCollins English Dictionary. Copyright © HarperCollins Publishers
Th
see synonyms of thWebster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.
Th
see synonyms of thThe American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.