Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of cyclostoma is as below...

Hyperoartia :: Hyperoartia (n. pl.) An order of marsipobranchs including the lampreys. The suckerlike moth contains numerous teeth; the nasal opening is in the middle of the head above, but it does not connect with the mouth. See Cyclostoma, and Lamprey..

Cyclostomata :: Cyclostomata (n. pl.) Alt. of Cyclostom.

Marsipobranchia :: Marsipobranchia (n. pl.) A class of Vertebrata, lower than fishes, characterized by their purselike gill cavities, cartilaginous skeletons, absence of limbs, and a suckerlike mouth destitute of jaws. It includes the lampreys and hagfishes. See Cyclostoma, and Lamprey. Called also Marsipobranchiata, and Marsipobranchii..

Gnathostoma :: Gnathostoma (n. pl.) A comprehensive division of vertebrates, including all that have distinct jaws, in contrast with the leptocardians and marsipobranchs (Cyclostoma), which lack them..

Cyclostoma :: Cyclostoma (n. pl.) A division of Bryozoa, in which the cells have circular apertures..

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