Acetic acid

Acetic acid, the pure acid of vinegar; the salts are called acetates.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Acerra * Acetone
[wait for the fun]
Acca-Laurentia
Acciaioli
Accolade
Accol`ti
Accor`so
Accra
Accrington
Accum, Friedrich
Accumulator
Acerra
Acetic acid
Acetone
Acet`ylene
Achæan League
Achæ`ans
Achai`a
Achard
Achard`, Louis Amédée
Acha`tes
Achelo`üs
Achen