Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • proper noun A taxonomic class within the subphylum Vertebrata — the living jawless fishes: lampreys and hagfishes; the cyclostomes.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From French cyclostome, from Ancient Greek κύκλος (kyklos, "circle") + στόμα (stoma, "mouth").

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