noun
nebula
A faint cloudy spot on the cornea of the eye.
The eye doctor notices a faint nebula on the patient's cornea.
Etymology
The Latin word means mist or cloud. Medicine uses that cloud image for a faint opacity that makes part of the normally transparent cornea look hazy.
More examples
- The report describes the small corneal spot as a nebula.
- Under magnification, the nebula is easier to see.
- The doctor checks both eyes for nebulae.
Forms
nebula · nebulae · nebulas
Similar words
- opacity
- Includes any loss of transparency, not just faint corneal spots.