acid

noun1 of 2

sour substance that reacts with metals e.g. lemon

• “This acid is extremely important in the industry and the laboratory.”Tatoeba
• “I read an article about acid rain yesterday.”Tatoeba

Sentences from Tatoeba show real usage. A word can have several meanings, so a sentence may use another one.

adjective2 of 2

Sour, sharp, or biting to the taste; tart; having the taste of vinegar.