Definition of evacuant in US English:

evacuant

adjective

  • (of a medicine or treatment) acting to induce some kind of bodily discharge.

    laxative, aperient, lenitive, cathartic, evacuant, purging
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noun

  • A medicine that induces some kind of bodily discharge, such as an emetic, a sudorific, or especially a laxative.

    • ‘For constipation common remedies were liquorice powder, Nyalls Figsen (Californian Syrup of Figs), cascara evacuant or senna pods.’
    laxative, enema, aperient, lenitive, cathartic, evacuant
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Origin

Mid 18th century: from Latin evacuant- ‘emptying (the bowels’), from the verb evacuare, later in the more general sense ‘remove (contents)’.

Pronunciation

evacuant

/əˈvakyəwənt//əˈvækjəwənt/