myosis

(noun) an acute infectious disease occurring in epidemic form and featuring paroxysms of pain (usually in the chest). Synonyms: epidemic pleurodynia, epidemic myalgia, diaphragmatic pleurisy, Bornholm disease.

(noun) reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller. Synonyms: light reflex, pupillary reflex, miosis.