methacholine
noun
metha·cho·line
ˌmeth-ə-ˈkō-ˌlēn 
: a parasympathomimetic drug administered in the form of its crystalline chloride C8H18ClNO2 especially to diagnose hypersensitivity of the bronchial air passages (as in asthma) see mecholyl, provocholine
Cite this Entry
“Methacholine.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/methacholine. Accessed 29 Oct. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share