jawless vertebrate 1
noundomain: animal
Princeton WordNet [ver.3.1]
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EnglishDefinition
eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms
Hypernym
animal living wholly or chiefly in or on water
Member_meronym
Agnatha 1
noun
superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms
EnglishHyponym
ostracoderm 1
noun
extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic
heterostracan 1
noun
extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian
osteostracan 1
noun
extinct jawless fish of the Devonian with armored head
anaspid 1
noun
extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian
conodont 2
noun
small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes
Member_holonym
Agnatha 1
noun
superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms
