Welsh

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Etymology

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From per- +‎ ocsid.

Pronunciation

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Noun

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perocsid m (plural perocsidau or perocsidiau)

  1. (chemistry) peroxide
    Synonym: tryegrid
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References

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  1. R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “perocsid”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies