酸

sudachi (species of Japanese citrus, Citrus sudachi)

glacial acetic acid

Chemistry

superacid

copper oxide (i.e. cuprous oxide, cupric oxide)

acidic paper

acid soil

Chemistry

keto acid; oxoacid

butyric acid producing bacillus (Clostridium butyricum)

deoxidation; deacidification

oxygenation

hydroxyl group (radical)

superphosphate

acidulant; acidity regulator

Toringo crabapple (Malus sieboldii)

acid salt

nitrate

nitric acid series

Noun or verb acting prenominally

oxygenated; oxygen

mixed acid (esp. of sulphuric acid and nitric acid)

acid-fast bacterium

carbon paper

parchment paper

decarbonation

acidification