myosis

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

• an acute infectious disease occurring in epidemic form and featuring paroxysms of pain (usually in the chest)

Related words

• Synonyms: 
  light reflex , pupillary reflex , miosis , epidemic pleurodynia , epidemic myalgia , diaphragmatic pleurisy , Bornholm disease