[ pri-pol-eks ]
/ prɪˈpɒl ɛks /
noun, plural pre·pol·li·ces [pri-pol-uh-seez] /prɪˈpɒl əˌsiz/.
a rudimentary additional digit on the preaxial side of the thumb of certain amphibians and mammals.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for prepollex
Breeding males have dark brown nuptial excrescences on the prepollex.Neotropical Hylid Frogs, Genus Smilisca|William E. Duellman
The digits (and metacarpals) are considered by Ritland to be 1-4, in addition to the prepollex, rather than 2-5.The Ancestry of Modern Amphibia: A Review of the Evidence|Theodore H. Eaton