[Cf. CANION (also spelt cannon), and CANNON sb.1] A cylindrical or sausage-like curl, properly horizontal, like the canions of breeches. Hence Cannon curls.
c. 1800. Mem. Mary Somerville, iii. (1873), 41. He wore a powdered wig, with cannons at the ears, and a pigtail.
1857. Geo. Eliot, Sc. Cleric. Life, Janets Repent., v. 218. With sandy hair, which was this morning arranged in taller cannon curls than usual. Ibid., II. 190. Old lawyer Pittmans daughters with cannon curls surmounted with large hats.