A*ce"tous (#; 277), a. [L. acetum
vinegar, fr. acere to be sour.] 1. Having a
sour taste; sour; acid. "An acetous spirit." Boyle.
"A liquid of an acetous kind." Bp. Lowth.
2. Causing, or connected with, acetification; as,
acetous fermentation.
Acetous acid, a name formerly given to
vinegar.