cyclostome

noun cy·clo·stome \ˈsī-klə-ˌstōm\

Definition of CYCLOSTOME

: any of a class (Cyclostomata) of jawless fishes having a large sucking mouth and comprising the hagfishes and lampreys

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

First Known Use: 1835

Medical Dictionary

noun cy·clo·stome \ˈsī-klə-ˌstōm, ˈsik-lə-\

: any vertebrate of the major taxonomic group Cyclostomata

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