Definition of parahydrogen in English:

parahydrogen

noun ˌparəˈhʌɪdrədʒ(ə)n

Chemistry

The form of molecular hydrogen in which the two nuclei in the molecule have antiparallel spins (so that the spectrum exhibits no hyperfine structure) and which forms about 25 per cent of hydrogen under normal conditions.

1920s; earliest use found in Chemical Abstracts. From para- + hydrogen, after German Parawasserstoff.

nounˌparəˈhʌɪdrədʒ(ə)n

Chemistry

The form of molecular hydrogen in which the two nuclei in the molecule have antiparallel spins (so that the spectrum exhibits no hyperfine structure) and which forms about 25 per cent of hydrogen under normal conditions.

1920s; earliest use found in Chemical Abstracts. From para- + hydrogen, after German Parawasserstoff.

词汇	parahydrogen
释义	Definition of parahydrogen in English: parahydrogen noun ˌparəˈhʌɪdrədʒ(ə)n Chemistry The form of molecular hydrogen in which the two nuclei in the molecule have antiparallel spins (so that the spectrum exhibits no hyperfine structure) and which forms about 25 per cent of hydrogen under normal conditions. Origin 1920s; earliest use found in Chemical Abstracts. From para- + hydrogen, after German Parawasserstoff. Definition of parahydrogen in US English: parahydrogen nounˌparəˈhʌɪdrədʒ(ə)n Chemistry The form of molecular hydrogen in which the two nuclei in the molecule have antiparallel spins (so that the spectrum exhibits no hyperfine structure) and which forms about 25 per cent of hydrogen under normal conditions. Origin 1920s; earliest use found in Chemical Abstracts. From para- + hydrogen, after German Parawasserstoff.
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