| pupil | contractile aperture in the iris of the eye |
|---|---|
| pupil | a child attending school |
| pupil | a learner who is enrolled in an educational institution |
| pupil | of or relating to the pupil of the eye |
| pupil | reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller |
| pupil | a ring of smooth muscle surrounding the iris |