- the first or innermost digit of the foot of humans and other primates or of the hind foot of other mammals; great toe; big toe.
- the comparable, usually backward-directed digit in birds.
Origin of hallux
1825–35; < Late Latin (h)allux, for Latin hallus, by association with pollex thumb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for hallux
The digit, d1, which stands as hallux is fully formed and has three phalanges.
In the normal hind foot of the cat the hallux is represented by a rudiment only.
In Cycloturus however the hallux is vestigial and it is absent in Glyptodonts.
Lophiomys differs from all other Rodents in having the hallux opposable.
In most birds the hallux is directed backwards, and the other toes forwards.
- the first digit on the hind foot of a mammal, bird, reptile, or amphibian; the big toe of man
C19: New Latin, from Late Latin allex big toe
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for hallux
1831, from Modern Latin hallux, corruption of allex "great toe."
Online Etymology Dictionary, © 2010 Douglas Harper
- The big toe.
- A homologous or similar digit on the hind foot of certain mammals.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.