• (n.) An extra first toe, or rudiment of a toe, on the preaxial side of the hallux.
(pre-hal´әks) an abnormal extra bone of the foot that grows from the medial border of the scaphoid.
Pre·hal'lux noun [ New Latin See Pre- , and Hallux .] (Anat.) An extra first toe, or rudiment of a toe, on the preaxial side of the hallux. 
Type: Term Pronunciation: prē-hal′ŭks Definitions: 1. A supernumerary digit, usually only partial, attached to the medial border of the great toe.