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/mɛθ.əˈkəʊ.liːn/ · noun
(pharmacology) A choline derivative with parasympathomimetic activity that can induce bronchoconstriction in asthmatics and is used in tests of airway responsiveness; O-acetyl-β-methylcholine, C₈H₁₈NO₂⁺..
Use methacholine when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Methacholine means (pharmacology) A choline derivative with parasympathomimetic activity that can induce bronchoconstriction in asthmatics and is used in tests of airway responsiveness; O-acetyl-β-methylcholine, C₈H₁₈NO₂⁺..
Common synonyms include mecholyl.
The opposite depends on the specific sense.
Use methacholine where its definition matches the intended context.
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