I. ˈ ̷ ̷ ̷ ̷+ˌ- noun
Etymology: counter- + irritant
: an agent applied locally to produce superficial inflammation with the object of reducing inflammation in deeper adjacent structures (as a mustard plaster applied to the chest in bronchitis) ; broadly : an additional irritation or discomfort that diverts attention from another
II. adjective
: having the properties of a counterirritant : dealing with or marked by counterirritants