Ultimately from Latin ac(eō) +‎ -yl.^[1][2][3]

• (UK, US) IPA^(key): /ˈæ.sɪl/, /ˈeɪ.saɪl/

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acyl (plural acyls)

1. (organic chemistry) Any of class of organic radicals, RCO-, formed by the removal of a hydroxyl group from a carboxylic acid.
   • 2009, Richard H. Wiley, Pyrazoles and Reduced and Condensed Pyrazoles, Volume 22, page 387:

     From ethyleneoxides or ethyleneimines carrying an acyl substituent, with hydrazine and its derivatives (Ch. 3. XV).

• Clay, Lacy, clay, lacy

Internationalism; compare English acyl. First attested in 1900.^[1]

• IPA^(key): /ˈa.t͡sɘl/
• Rhymes: -at͡sɘl
• Syllabification: a‧cyl

acyl m inan

1. (organic chemistry) acyl (any of class of organic radicals, RCO-, formed by the removal of a hydroxyl group from a carboxylic acid)

   chlorek acylu ― acyl chloride

• acyl in PWN's encyclopedia
• acyl in Narodowy Fotokorpus Języka Polskiego

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