noun Anatomy.

  1. a dense, white, fibrous membrane that, with the cornea, forms the external covering of the eyeball.


  1. the firm white fibrous membrane that forms the outer covering of the eyeballAlso called: sclerotic

n.1886, medical Latin, from Greek sklera (menix) “the hard (membrane),” fem. of skleros “hard” (see sclerosis). n. pl. scle•ras

  1. The tough fibrous tunic forming the outer envelope of the eye and covering all of the eyeball except the cornea; the white of the eye.sclerotic

  1. The tough, white, fibrous tissue that covers all of the eyeball except the cornea.

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