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Th

Symbol, Chemistry
1.

-th1

1.
a suffix forming nouns of action (birth) or abstract nouns denoting quality or condition (depth; length; warmth).
Origin
Middle English -th(e), Old English -thu, -tho, -th (variant -t after a velar, f, or s); cognate with Gothic -itha, Latin -tus, Greek -tos

-th2

1.
a suffix used in the formation of ordinal numbers (fourth, tenth), in some cases, added to altered stems of the cardinal (fifth; twelfth).
Origin
Middle English -the, -te, Old English -tha, -the (variant -ta after f or s); cognate with Old Norse -thi, -di, Latin -tus, Greek -tos; see -eth

-th3

1.
variant of -eth1 :
doth.

Th.

1.

T.H.

1.
Territory of Hawaii.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for Th

th

abbreviation
1.
Thailand

Th

Chemical symbol
1.
thorium

-th1

suffix
1.
(from verbs) indicating an action or its consequence growth
2.
(from adjectives) indicating a quality width
Word Origin
from Old English -thu, -tho

-th2

suffix
1.
forming ordinal numbers fourth, thousandth
Word Origin
from Old English -(o)tha, -(o)the
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for Th
-th
suffix forming nouns from verbs (depth, strength, truth, etc.), from O.E. -ðu, -ð, from PIE *-ita (cf. Skt. -tati-, Gk. -tet-, L. -tati-). The suffix forming ordinal numbers (fourth, tenth, etc.) is O.E. -ða, from PIE *-tos (cf. Skt. thah, Gk. -tos, L. -tus).
Online Etymology Dictionary, © 2010 Douglas Harper
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Th in Medicine

Th
The symbol for the element thorium.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Th in Science
Th  
The symbol for thorium.
thorium
  (thôr'ē-əm)   
Symbol Th
A silvery-white, radioactive metallic element of the actinide series. It is used for fuel in some nuclear reactors and for improving the high-temperature strength of magnesium alloys. The only naturally occurring isotope of thorium, Th 232, is also its most stable, having a half-life of 14.1 billion years. Atomic number 90; atomic weight 232.038; approximate melting point 1,750°C; approximate boiling point 4,500°C; approximate specific gravity 11.7; valence 4. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Th in Technology

networking
The country code for Thailand.
(1999-01-27)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Related Abbreviations for Th

th

Thai

Th

  1. Thessalonians
  2. thorium
  3. Thursday

TH

townhouse
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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