Codeine (noun)

1. A white crystalline alkaloid that is a mild narcotic analgesic and antitussive and is used in medicine, typically as a hydrochloride or phosphate salt.
2. A drug that is used to relieve pain and coughing, and is often found in over-the-counter and prescription medicines.

Origin:

Codeine is an alkaloid found in the opium poppy and was first isolated in 1832 by french chemist pierre-jean robiquet. the name codeine comes from the greek word "kodeia" which means "poppy head".

Examples:

1. Codeine is often used to treat mild to moderate pain.
2. The cough syrup contains codeine to help relieve coughing.
3. Codeine is a common ingredient in many pain relievers.
4. The patient was prescribed codeine for his back pain.
5. Codeine is classified as a schedule II controlled substance.