Definitions

1. noun

A genus of flowering plants in the family Rubiaceae, native to South America, and the source of quinine.

“The botanist studied the different species of cinchona plants to find the one with the highest quinine content.”

2. noun

A tree of the genus Cinchona, cultivated for its bark, which contains quinine.

“The cinchona tree is an important crop in many tropical regions due to its medicinal properties.”