In most birds the hallux is directed backwards, and the other toes forwards.
All the digits are armed with claws, and the pollex and hallux are not opposable.
In hallux valgus, the metatarso-phalangeal joint of the great toe undergoes changes characteristic of arthritis deformans.
Lophiomys differs from all other Rodents in having the hallux opposable.
The ears are very long, and the limbs elongated; the hallux is absent; the teeth are exactly as in Sminthopsis.
The hind-foot is also three-toed, and there is a trace of the hallux.
The digit, d1, which stands as hallux is fully formed and has three phalanges.
There is no hallux, though the metatarsal belonging to that digit is present.
In Cycloturus however the hallux is vestigial and it is absent in Glyptodonts.
The general form is Viverrine, and the hallux is sometimes present though small.
1831, from Modern Latin hallux, corruption of allex "great toe."
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.