Source : WordNet®

myosis
     n 1: an acute infectious disease occurring in epidemic form and
          featuring paroxysms of pain (usually in the chest) [syn:
           {epidemic pleurodynia}, {epidemic myalgia}, {diaphragmatic
          pleurisy}, {Bornholm disease}]
     2: reflex contraction of the sphincter muscle of the iris in
        response to a bright light (or certain drugs) causing the
        pupil to become smaller [syn: {light reflex}, {pupillary
        reflex}, {miosis}]
     [also: {myoses} (pl)]

myoses
     See {myosis}