cephalaspid

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Definitions from WordNet

Noun cephalaspid has 1 sense

osteostracan, cephalaspid - extinct jawless fish of the Devonian with armored head
--₁ is a kind of jawless vertebrate, jawless fish, agnathan
--₁ is a member of
Osteostraci, suborder Osteostraci, Cephalaspida, suborder Cephalaspida

Definitions from the Web

Cephalaspid

Noun:

1. A member of a group of primitive fish-like vertebrates comprising the hagfishes and lampreys, characterized by a jawless circular mouth and a long eel-like body.

Example: The cephalaspids are considered to be the most ancient vertebrates.

Adjective:

1. Pertaining to the cephalaspids.

Example: The cephalaspid fossils found on the shore indicate the presence of ancient marine life.

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