para-hydrogen

noun
\ ¦parə+ \

Definition of para-hydrogen

: molecular hydrogen in which the two hydrogen nuclei are spinning in opposite directions so that their contribution to the total angular momentum is zero — compare ortho-hydrogen

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History and Etymology for para-hydrogen

para- entry 1 + hydrogen

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Cite this Entry

“Para-hydrogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/para-hydrogen. Accessed 3 Jun. 2020.

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