noun (n)

• a learner who is enrolled in an educational institution(noun.person)

  Synonym:
  educatee, student
  

  source: wordnet30
• the contractile aperture in the center of the iris of the eye; resembles a large black dot(noun.body)

  source: wordnet30
• a young person attending school (up through senior high school)(noun.person)

  Synonym:
  school-age child, schoolchild
  

  source: wordnet30
• The aperture in the iris; the sight, apple, or black of the eye. See the Note under Eye, and Iris.(noun)

  source: webster1913
• A youth or scholar of either sex under the care of an instructor or tutor.(noun)

  source: webster1913