hag's tooth
Webster's Dictionary (GCIDE)
1.A witch, sorceress, or enchantress; also, a wizard. [Obs.] "[Silenus] that old hag." --Golding. [1913 Webster]
2.An ugly old woman. --Dryden. [1913 Webster]
3.A fury; a she-monster. --Crashaw. [1913 Webster]
4.(Zool.) An eel-like marine marsipobranch (Myxine glutinosa), allied to the lamprey. It has a suctorial mouth, with labial appendages, and a single pair of gill openings. It is the type of the order Hyperotreta. Called also hagfish, borer, slime eel, sucker, and sleepmarken. [1913 Webster]
5.(Zool.) The hagdon or shearwater. [1913 Webster]
6.An appearance of light and fire on a horse's mane or a man's hair. --Blount. [1913 Webster]
Hag moth (Zool.), a moth (Phobetron pithecium), the larva of which has curious side appendages, and feeds on fruit trees.
Hag's tooth (Naut.), an ugly irregularity in the pattern of matting or pointing. [1913 Webster]