A Plication

1. (now chiefly biology, geology) An act of folding. [from 15th c.]
2. (now chiefly biology, geology) A fold or pleat. [from 18th c.]
3. (medicine) A surgical procedure in which a body part is strengthened or shortened by pulling together folds of excess material, and suturing them into place. [from 20th c.]

plicature