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单词 prepollex
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.
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