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tritium

[trit-ee-uh m, trish-, trish-uh m]
noun Chemistry.
  1. an isotope of hydrogen having an atomic weight of three.
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Origin of tritium

1930–35; < New Latin < Greek trít(os) third (tri- tri- + -tos adj. suffix) + New Latin -ium -ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for tritium

Historical Examples

  • Wanted to trade all the tritium we'd need to blow up a planet just for trees; because they worshipped trees!

    The Women-Stealers of Thrayx

    Fox B. Holden


British Dictionary definitions for tritium

tritium

noun
  1. a radioactive isotope of hydrogen, occurring in trace amounts in natural hydrogen and produced in a nuclear reactor. Tritiated compounds are used as tracers. Symbol: T or ³H; half-life: 12.5 years
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Word Origin

C20: New Latin, from Greek tritos third
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 tritium

n.

1933, Modern Latin, from Greek tritos "third" (see third) + chemical suffix -ium.

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Online Etymology Dictionary, © 2010 Douglas Harper

tritium in Medicine

tritium

(trĭtē-əm, trĭshē-)
n. Symbol T
  1. A rare radioactive hydrogen isotope with atomic mass 3 and half-life 12.5 years, prepared artificially for use as a tracer and as a constituent of hydrogen bombs.hydrogen-3
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

tritium in Science

tritium

[trĭtē-əm, trĭshē-əm]
  1. A radioactive isotope of hydrogen whose nucleus has one proton and two neutrons with atomic mass of about 3 and a half life of 12.5 years. Tritium is rare in nature but can be made artificially in nuclear reactions. It is used in thermonuclear weapons and luminescent paints, and sometimes as a tracer. See more at hydrogen.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.