PERFRIGERATION

\pˌɜːfɹɪd͡ʒəɹˈe͡ɪʃən], \pˌɜːfɹɪd‍ʒəɹˈe‍ɪʃən], \p_ˌɜː_f_ɹ_ɪ_dʒ_ə_ɹ_ˈeɪ_ʃ_ə_n]\
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1920 - A practical medical dictionary.
By Stedman, Thomas Lathrop
 
1846 - Medical lexicon: a dictionary of medical science
By Robley Dunglison

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acetyl group

  • the organic group of acetic acid (CH3CO-)
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