[doo-teer-ee-uh m, dyoo-]
- an isotope of hydrogen, having twice the mass of ordinary hydrogen; heavy hydrogen. Symbol: D; atomic weight: 2.01; atomic number: 1.
Origin of deuterium
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Examples from the Web for deuterium
From that, they extracted the ratio of the number of deuterium atoms to the number of hydrogen atoms.
Deuterium is an isotope of hydrogen containing a proton and neutron in its nucleus, while normal hydrogen has only a proton.
However, even that ginormous difference still shows about three times the amount of deuterium than we see on our planet.
One chemical test involves measuring the relative amount of deuterium in water.
Well, heavy water is made of one atom of oxygen plus two atoms of deuterium, which is the first isotope of hydrogen.
Then, for a considerably higher price, he would undertake to collect a sample of the deuterium they were using.
- a stable isotope of hydrogen, occurring in natural hydrogen (156 parts per million) and in heavy water: used as a tracer in chemistry and biology. Symbol: D or ²H; atomic no: 1; atomic wt: 2.014; boiling pt: –249.7°C
C20: New Latin; see deutero-, -ium; from the fact that it is the second heaviest hydrogen isotope
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 deuterium
1933, coined by U.S. chemist Harold C. Urey, with Modern Latin ending + Greek deuterion, neuter of deuterios "having second place," from deuteros "second," from duo (see two). So called because it is twice the mass of hydrogen.
Online Etymology Dictionary, © 2010 Douglas Harper
- An isotope of hydrogen with one proton and one neutron in the nucleus having an atomic weight of 2.014.heavy hydrogen hydrogen-2
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- An isotope of hydrogen whose nucleus has one proton and one neutron and whose atomic mass is 2. Deuterium is used widely as a tracer for analyzing chemical reactions, and it combines with oxygen to form heavy water. Also called heavy hydrogen See Note at heavy water.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.