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orthohydrogen

[awr-thuh-hahy-druh-juh n] /ˌɔr θəˈhaɪ drə dʒən/
noun, Physics, Chemistry
1.
the form of molecular hydrogen in which the nuclei of the two hydrogen atoms contained in the molecule have spins in the same direction.
Compare parahydrogen.
Origin
1925-1930
1925-30; ortho- + hydrogen
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ortho-hydrogen

orthohydrogen

/ˌɔːθəʊˈhaɪdrədʒən/
noun
1.
(chem) the form of molecular hydrogen, constituting about 75 per cent of the total at normal temperatures, in which the nuclei of the atoms spin in the same direction Compare parahydrogen
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
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8
7
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