Methacholine

//mɛθ.əˈkəʊ.liːn// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    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⁺. uncountable
  2. 2
    parasympathomimetic drug (trademark Mecholyl) that stimulates secretions and smooth muscle activity wordnet

Etymology

From meth(yl) + -a- + choline.

Related phrases

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.