lesion

noun

1. A wound or injury.
2. An infected or otherwise injured or diseased organ or part, especially such on a patch of skin.
3. Any compound formed from damage to a nucleic acid.
4. Injury or an unfair imbalance in a commutative contract wherein the consideration is less than half of the market value, which then serves as a basis for the injured party to sue to rescind the agreement.

verb

1. (transitive)To wound or injure, especially in an experiment or other controlled procedure.