Meaning of orthohydrogen in English:

orthohydrogen

noun

Chemistry
  • The form of molecular hydrogen whose spectrum exhibits a hyperfine structure of triplets owing to the two nuclei in the molecule having parallel spins.

    Orthohydrogen differs slightly in physical properties from the other form, parahydrogen, and forms about 75 per cent of hydrogen in equilibrium at room temperature.

Pronunciation

orthohydrogen

/ˌɔːθəʊˈhʌɪdrədʒ(ə)n/ /ˈɔːθəʊˌhʌɪdrədʒ(ə)n/

Origin

1920s; earliest use found in Chemical Abstracts. From ortho- + hydrogen, after German Orthowasserstoff. Compare orthohelium, parahydrogen.