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Definition of Petromyzon
1. Noun. Typical lampreys.
Exact synonyms: Genus Petromyzon
Generic synonyms: Fish Genus
Group relationships: Family Petromyzontidae, Petromyzontidae
Member holonyms: Petromyzon Marinus, Sea Lamprey
Generic synonyms: Fish Genus
Group relationships: Family Petromyzontidae, Petromyzontidae
Member holonyms: Petromyzon Marinus, Sea Lamprey
Medical Definition of Petromyzon
1. Primitive marine vertebrate (Class Agnatha) with eel like body and lacking true jaws. Their relatively simple nervous system has been studied in some detail. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)