Th

|

Symbol, Chemistry.


-th

1

a suffix forming nouns of action (birth) or abstract nouns denoting quality or condition (depth; length; warmth).

Origin of -th

1
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 of -th

2
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 -eth2

-th

3

variant of -eth1: doth.

Th.

T.H.

Territory of Hawaii.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for th


British Dictionary definitions for th

th

the internet domain name for

Thailand

Th

the chemical symbol for

thorium

-th

1

suffix forming nouns

(from verbs) indicating an action or its consequencegrowth
(from adjectives) indicating a qualitywidth

Word Origin for -th

from Old English -thu, -tho

-th

2

-eth

suffix

forming ordinal numbersfourth; thousandth

Word Origin for -th

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

Word Origin and History for th
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for th

Th

The symbol for the elementthorium

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for th

Th

The symbol for thorium.

thorium

[ thôrē-əm ]

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.