Pollex

n.

1.

(Anat.) The first, or preaxial, digit of the fore limb, corresponding to the hallux in the hind limb; the thumb. In birds, the pollex is the joint which bears the bastard wing.

Noun

1.

pollex - the thick short innermost digit of the forelimb Synonyms: thumb

finger, musculus abductor pollicis, thumb, thumbnail