名詞 hallux:

1. the first largest innermost toe
   同義詞：big toe, great toe

hal.lux

n.（名詞）
【復數(shù)】 hal.lu.ces[h2l.y…-sôz., h2l.…-]
The innermost or first digit on the hind foot of certain mammals. In human beings, it is commonly called the big toe.
拇趾，大趾：某些哺乳動物后腳上最內(nèi)側(cè)或是人類的第一個腳趾頭，它通常為稱為大拇趾
A homologous digit of a bird, a reptile, or an amphibian. In birds, it is often directed backward.
后趾：鳥、爬行動物或兩棲動物類似的一個趾頭，對鳥而言它通常向后

來源：
Latin hallux, hallus
拉丁語 hallux, hallus