- læsion (archaic)
lesion (plural lesions)
- (pathology) A wound or injury.
- (medicine) An infected or otherwise injured or diseased organ or part, especially such patch of skin.
- (biochemistry) Any compound formed from damage to a nucleic acid.
a wound or an injury
an infected or otherwise injured or diseased organ or part
to wound or injure, especially in an experiment or other controlled procedure