Definition of "hallux" [‖Hal•lux]

• The innermost or first digit on the hind foot of certain mammals. The human hallux is commonly called the big toe. (noun)
• A homologous digit of a bird, reptile, or amphibian. In birds, it is often directed backward. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• ""Over time, that insignificant value becomes significant," said Connors, who rattled through an abridged list of Khannouchi's ailments—patellofemoral syndrome, ankle impingement, bone spurs and something called hallux rigidus, which is degenerative arthritis in the big toe."
• "The hind toe is called the hallux, and corresponds to the thumb of the human hand, so that in grasping an object it can be made to meet any of the other toes."
• "Osteoarthritis of the first metatarsophalangeal joint (MPJ) of the foot, termed hallux limitus, is common and painful."