1. An alkaloid obtained from various species of cinchona, or one of its active principles.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• guinie,
• quintina,
• gunine,
• guining,
• guinne,
• qunne,
• quinne,
• guinite,
• guenine,
• quisine,
• cusinine,
• quisene,
• guinuine,
• guinine,
• unine,
• quezine,
• quentine,
• cainine,
• guinene,
• quaintine

• quinone.

The adjective form of the word "quinine" is "quinic".

The plural form of the word "quinine" is "quinines"

The singular form of the word "quinine" is "quinine".