aceto- combining form [ǝ'si:tǝʊ, 'asɪtǝʊ] of ACETIC, ACETYL: see -O-. Before a vowel also acet-.

■ acetoa'cetic adjective:

■ acetoacetic acid, an acid, CH₃COCH₂COOH, present in the urine of diabetics, and when pure a viscous unstable liquid L19.

■ aceto'acetate noun a salt or ester of this acid L19.

■ aceto'nitrile, aceto'nitril noun a toxic odoriferous liquid, CH₃CN; methyl cyanide: M19.

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