Word

pupillary reflex, n.

reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
<noun.act>

light reflex miosis myosis pupillary reflex

lexical pointers

derivationally related form

miotic

lexical pointers

derivationally related form

myotic

semantic pointers

hypernym

reflex, reflex response, reflex action, instinctive reflex, innate reflex, inborn reflex, unconditioned reflex, physiological reaction