[ trit-ee-uhm, trish-, trish-uhm ]
/ ˈtrɪt i əm, ˈtrɪʃ-, ˈtrɪʃ əm /
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noun Chemistry.
an isotope of hydrogen having an atomic weight of three. Symbols:3H, T
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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. 2021

How to use tritium in a sentence

British Dictionary definitions for tritium

/ (ˈtrɪtɪəm) /

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

Word Origin for tritium

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

Medical definitions for tritium

[ trĭtē-əm, trĭshē- ]

n. Symbol T
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
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for tritium

[ trĭtē-əm, trĭshē-əm ]

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.