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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Origin and Etymology of petromyzon
New Latin Petromyzont-, Petromyzon, from petr- + -myzont-, -myzon -myzon
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