[ sahy-kluh-stohm, sik-luh- ]
/ ˈsaɪ kləˌstoʊm, ˈsɪk lə- /
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belonging or pertaining to the Cyclostomata, a subclass of jawless, eellike, marine vertebrates of the class Agnatha, comprising the lampreys and hagfishes.
having a circular mouth.


a cyclostome vertebrate; a lamprey or hagfish.



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Origin of cyclostome

First recorded in 1825–35; cyclo- + -stome
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for cyclostome

British Dictionary definitions for cyclostome

/ (ˈsaɪkləˌstəʊm, ˈsɪk-) /


any primitive aquatic jawless vertebrate of the class Cyclostomata, such as the lamprey and hagfish, having a round sucking mouth and pouchlike gills


of, relating to, or belonging to the class Cyclostomata
Also called: marsipobranch

Derived forms of cyclostome

cyclostomate (saɪˈklɒstəmɪt, -ˌmeɪt) or cyclostomatous (ˌsaɪkləʊˈstɒmətəs, -ˈstəʊmə-, ˌsɪk-), adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for cyclostome

[ sīklə-stōm′ ]

Any of various jawless fish of the order Cyclostomata, having a long, eellike body without scales, a cartilaginous skeleton, and a disklike mouth used for sucking juices from prey. Cyclostomes include the hagfish and lampreys, although some scientists classify these two groups as separate orders.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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