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pupil (EN)
noun

noun “pupil”

singular pupil, plural pupils
  1. (especially UK) a student under the supervision of a teacher, especially in a school
    The pupils gathered in the assembly hall for the morning announcements.
  2. a person who studies under the guidance of a teacher or mentor
    The artist's pupils learned her techniques to create their own masterpieces.
  3. (anatomy) the black circular opening in the center of the eye, through which light passes to the retina
    The doctor examined the patient's pupils for signs of a concussion.