Agnathan

//ˈæɡ.nə.θən// adj, noun

adj, noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A member of the superclass Agnatha of jawless vertebrates.

    "Thus should the cranial neural crest in cyclostomes prove to be non-skeletogenous this might be a reflection either of its own primitiveness or of the different evolutionary origins and morphological status of the visceral skeleton in agnathans and gnathostomes."

  2. 2
    eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms wordnet
Adjective
  1. 1
    Belonging or pertaining to the superclass Agnatha, the jawless vertebrates. not-comparable

    "Haikouichthys is one of three species of jawless (or agnathan) fish to be found in the Early Cambrian period."

Synonyms

All synonyms
agnathagnathagnathaagnathaagnathidgnathostome

Example

More examples

"Haikouichthys is one of three species of jawless (or agnathan) fish to be found in the Early Cambrian period."

Etymology

From Agnatha, from Ancient Greek ἀ- (a-, “without”) + γνάθος (gnáthos, “jaw”).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.