| 释义 |
‖ preˈpollex, præ- Anat. and Zool.
[mod.L. f. præ, pre- B. 3 + pollex.]
A rudimentary structure, sometimes osseous, similar to the prehallux, found in certain animals on the radial border of the hand or fore-foot, and supposed to represent an additional digit.
1889[see prehallux]. 1891Flower & Lydekker Mammalia 49 Occasionally, as in Pedetes caffer, the so-called prepollex consists of two bones, of which the distal one bears a distinct nail-like horny covering. |