Word forms: purgatives
1. countable noun A purgative is a medicine that causes you to get rid of unwanted waste from your body. [formal] ⇒ The doctors attempted to reduce his high fever by inducing diarrhea with a purgative. 2. adjective [ADJ n]
A purgative substance acts as a purgative. [formal] ⇒ ...purgative oils. ⇒ ...a purgative tea.
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