vilanterol
noun
vi·lan·te·rol
| \ vī-ˈlan-tə-ˌrȯl
\
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Medical Definition of vilanterol
: a beta-agonist bronchodilator C22H33Cl2NO5·C20H16O2 administered by oral inhalation usually in combination with another drug to treat asthma and chronic obstructive pulmonary disease