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pupil
(redirected from fixed pupil)

   Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia, Hutchinson 0.03 sec.
pupil: see eye eye, organ of vision and light perception. In humans the eye is of the camera type, with an iris diaphragm and variable focusing, or accommodation. Other types of eye are the simple eye, found in many invertebrates, and the compound eye, found in insects and many
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pupil1
1. a student who is taught by a teacher, esp a young student
2. Civil and Scots law a boy under 14 or a girl under 12 who is in the care of a guardian

pupil2
the dark circular aperture at the centre of the iris of the eye, through which light enters

pupil [′pyü·pəl]
(anatomy)
The contractile opening in the iris of the vertebrate eye.


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