Borrowing from Middle French codicille, from Latin cōdicillus, diminutive of cōdex. See code
codicil (plural codicils)
- (law) An addition or supplement that explains, modifies, or revokes a will or part of one.
- 2005 : If Nick answered a question Wani listened to him and then gave a flat little codicil or correction. - Alan Hollinghurst, The Line of Beauty, (Bloomsbury Publishing, paperback edition, 378)
an addition made to a will