SINCE 1828
Petromyzontidae
plural noun
Pet·ro·my·zon·ti·dae
| \ -mīˈzäntəˌdē\
Definition of Petromyzontidae
: a family of cyclostomes (order Hyperoartia) comprising elongated animals that resemble eels or hagfishes, have no barbels and seven pairs of circular gill openings, and feed on the blood of fishes which they obtain by rasping the flesh with their toothed circular mouth — see petromyzon — compare lamprey
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