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orthohydrogen

[ awr-thuh-hahy-druh-juhn ]

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.


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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Word History and Origins

Origin of orthohydrogen1

First recorded in 1925–30; ortho- + hydrogen

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orthographyorthokeratology