noun
Chemical term for an acid, often contrasted with アルカリ or 塩基. Common in science, medicine, and everyday product contexts.
塩酸は強い酸の一つです。
Hydrochloric acid is one kind of strong acid.
酸とアルカリを混ぜると反応が起こる。
A reaction occurs when an acid and an alkali are mixed.
noun
Refers to the acidic sharpness or sour quality in food and drink. 酸味 is often the more explicit everyday noun for 'sour taste,' but 酸 is used in expressions such as 酸が強い.
このみかんは酸が強くて少し食べにくい。
This mandarin is very sour and a little hard to eat.
このワインは酸がきれいに残っている。
This wine retains a clean acidity.
A more explicit noun for sour taste or acidity in food and drink; 酸 can sound broader or more technical depending on context.
An adjective meaning 'sour'; used to describe taste directly, while 酸 is a noun.
Means 'acidic' or 'acidity' as a property, especially in scientific or product descriptions; 酸 names the substance or sour/acidity component itself.
Refers to alkali or alkaline substances, often contrasted with 酸 in chemistry and everyday product labels.
Sino-Japanese reading さん of the kanji 酸. The spelling is conventionally associated with acid and sourness; no more specific historical derivation is asserted here.