Definitions

1. adjective

Relating to or denoting any of the acetylcholine receptors that are coupled to G-proteins and are found in smooth muscle, the heart, and the exocrine glands.

“The muscarinic receptors in the heart are responsible for regulating heart rate.”

2. noun

A muscarinic receptor or a muscarinic acetylcholine receptor.

“The muscarinic receptors in the eye are affected by glaucoma.”

3. noun

A subtype of muscarinic acetylcholine receptor, such as M1, M2, M3, M4, or M5.

“The M3 muscarinic receptor is found in the smooth muscle of the gastrointestinal tract.”