Pharmacology (noun)

1. The branch of medicine and biology that deals with the study of drugs and their effects on the body.
2. The study of the properties, effects, and uses of drugs.

Origin:

From the greek word "pharmakon" meaning drug and the suffix "-logy" meaning the study of.

Examples:

1. She is studying pharmacology in order to become a pharmacist.
2. The pharmacology of the drug was not well understood before it was approved.
3. Pharmacology is a important field in modern medicine.
4. The pharmacology of the new drug is still being studied.
5. He is an expert in pharmacology and toxicology.