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ortho-hydrogen

noun
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\ ¦ȯ(r)thə+ \

Definition of ortho-hydrogen

: molecular hydrogen in which the two hydrogen nuclei are spinning in the same direction ordinary hydrogen gas comprises an equilibrium mixture of three parts of ortho-hydrogen (with parallel nuclear spin) to one part of para-hydrogen (with antiparallel nuclear spin)— Otto Reinmuth — compare para-hydrogen

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“Ortho-hydrogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ortho-hydrogen. Accessed 18 Aug. 2022.

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