petromyzontid
/ˌpɛtrə(ʊ)mʌɪˈzɒntɪd/Zoology
noun
A fish of the family Petromyzontidae; a lamprey.
Origin
Late 19th century; earliest use found in Johnson's New Universal Cyclopedia. From scientific Latin Petromyzontidae, family name from Petromyzont- + -idae.