anaspida
English Thesaurus
1. extinct order of jawless vertebrates (noun.animal)
hypernym | : | animal order, |
definition | : | the order of animals (noun.animal) |
member holonym | : | anaspid, |
definition | : | extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian (noun.animal) |
member meronym | : | agnatha, superclass agnatha, |
definition | : | superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms (noun.animal) |
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