cy·​clo·​stome ˈsī-klə-ˌstōm How to pronounce cyclostome (audio)
: any of a class (Cyclostomata) of jawless fishes having a large sucking mouth and comprising the hagfishes and lampreys

Examples of cyclostome in a Sentence

Recent Examples on the Web In 2016, a group of scientists in the U.S. proposed a hypothesis that the Tully monster was an early vertebrate similar in some anatomical details to the modern cyclostomes (a group including today jawless fish like lamprey and hagfish). David Bressan, Forbes, 18 Apr. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'cyclostome.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


ultimately from Greek kykl- + stoma mouth — more at stomach entry 1

First Known Use

1835, in the meaning defined above

Time Traveler
The first known use of cyclostome was in 1835

Dictionary Entries Near cyclostome

Cite this Entry

“Cyclostome.” Dictionary, Merriam-Webster, Accessed 25 Feb. 2024.

Medical Definition


cy·​clo·​stome ˈsī-klə-ˌstōm, ˈsik-lə- How to pronounce cyclostome (audio)
: any vertebrate of the class or order Cyclostomata

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