Th

Dictionary.com Unabridged

-th

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

-th

2
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

-th

3
variant of -eth1: doth.

Th.

T.H.

Territory of Hawaii.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
th
 
the internet domain name for
Thailand

Th
 
the chemical symbol for
thorium

-th1
 
suffix forming nouns
1.  (from verbs) indicating an action or its consequence: growth
2.  (from adjectives) indicating a quality: width
 
[from Old English -thu, -tho]

-th or -eth2
 
suffix
forming ordinal numbers: fourth; thousandth
 
[from Old English -(o)tha, -(o)the]
 
-eth or -eth2
 
suffix
 
[from Old English -(o)tha, -(o)the]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

-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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American Heritage
Medical Dictionary

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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American Heritage
Science Dictionary
Th  
The symbol for thorium.
thorium   (thôr'ē-əm)  Pronunciation Key 
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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FOLDOC
Computing Dictionary

th definition

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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American Heritage
Abbreviations & Acronyms
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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