pet·​ro·​my·​zon | \ ˌpe‧trōˈmīˌzän\

Definition of petromyzon

1 capitalized : a genus (the type of the family Petromyzontidae) of cyclostomes comprising the typical lampreys
2 plural -s : any cyclostome of the genus Petromyzon

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History and Etymology for petromyzon

New Latin Petromyzont-, Petromyzon, from petr- + -myzont-, -myzon -myzon

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to express emotion in a dramatic way

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