Of or relating to cinchonine; describing compounds, acids, or derivatives formed from or containing cinchonine.
From cinchonine + -ic (adjectival suffix), creating an adjective to describe substances related to the cinchonine alkaloid. Standard in pharmaceutical and chemical nomenclature.
You can trace the word family: cinchona → cinchonine (the compound) → cinchoninic (the adjective) → cinchoninic acid (the derived chemical)—it's like how English lets you build whole word families from a single root.
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