Bible Dictionaries
Pterygopodium

Webster's Dictionary

(n.) A specially modified part of the ventral fin in male elasmobranchs, which serves as a copulatory organ, or clasper.

Bibliography Information
Webster, Noah. Entry for 'Pterygopodium'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/pterygopodium.html. 1828.