pollex

/pol-eks/US // ˈpɒl ɛks //UK // (ˈpɒlɛks) //

多力斯,多力仕,多力克斯,多力

Definitions

n.名词 noun

1
plural pol·li·ces [pol-uh-seez]. /ˈpɒl əˌsiz/.
- : the innermost digit of the forelimb; thumb.

Paltroon is from pollex, a thumb, and truncare, to cut off; for cowards use to cut their thumbs to avoid service.
In the anterior limb the radius and the pollex are pre-axial, the ulna and the fifth finger are postaxial.
The posterior limb is, as a rule, pentedactylate, but in nearly every case the pollex is vestigial or absent.
The hand consists of four complete digits, and a vestigial pollex reduced to a short metacarpal.
The first digit or pollex includes two phalanges, the distal one being very small and bearing a claw.