Share this entry

hallux Syllabification: hal·lux
Pronunciation: /ˈhaləks/

Definition of hallux in English:

noun (plural hallucesˈhal(y)əˌsēz)

1A person’s big toe.
Example sentences
  • A hallux digital pressure is considered normal at 50 mm Hg; values of 30 mm Hg or lower are indicative of a significant decease in peripheral perfusion.
  • The different areas were the medial and lateral heel; the medial and lateral midfoot; the medial, central, and lateral forefoot; the hallux; the second toe; and the lateral toes.
  • Chen et al. measured peak pressures under the heel, the medial forefoot, and the hallux of 290 kPa, 390 kPa, and 380 kPa.
1.1 Zoology The innermost digit of the hind foot of vertebrates.
Example sentences
  • They have an opposable hallux on their hind feet, and their pelage is soft, thick, and wooly.
  • Arnold says that ‘some birds, such as gulls, lose the external hallux entirely,’ yet all gulls have an external hallux, although it is very reduced in the two species of kittiwakes.
  • Most of the fossil tracks show three slender toes tipped by small claws, but some also bear the imprint of a small, rear-facing toe called a hallux.


Mid 19th century: modern Latin alteration of medieval Latin allex, Latin hallus.

Definition of hallux in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day fortissimo
Pronunciation: fɔːˈtɪsɪməʊ
(especially as a direction) very loud or loudly