adjective
Definition: Having a sharp or biting quality, often used to describe a sarcastic or scornful manner. In chemistry, it refers to substances that have a high concentration of acid or possess the properties of an acid.
Example: Her acid remarks during the meeting left everyone feeling uncomfortable.
noun
Definition: A type of substance that has a sour flavor and can produce hydrogen ions when mixed with water. These substances can also react with bases and some metals to create salts.
Example: Lemon juice is a common example of an acid due to its sour taste.