noun
bitter tincture
A pharmaceutical preparation; a tincture made with bitter herbs, used as a digestive aid or flavoring.
食前に苦味チンキを数滴、水に落として飲む。
Before meals, put a few drops of bitter tincture into water and drink it.
チンキ is the general term for tincture; 苦味チンキ specifically refers to a bitter tincture.
Compound of 苦味 (くみ, 'bitter taste') and チンキ (from Dutch 'tinctuur' or German 'Tinktur', meaning 'tincture').