The innermost or first digit on the hind foot of certain mammals. The human hallux is commonly called the big toe.
A homologous digit of a bird, reptile, or amphibian. In birds, it is often directed backward.
hallux hal·lux (hāl'əks) n. pl. hal·lu·ces (hāl'yə-sēz', hāl'ə-)
The big toe.
A homologous or similar digit on the hind foot of certain mammals.