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n. pl. scy·phis·to·mae (-mē) or scy·phis·to·mas
A larva of a scyphozoan, consisting of a very small sessile polyp that successively splits off free-swimming medusas.

[New Latin : Greek skuphos, cup + Greek stoma, mouth.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -mae (-ˌmiː) or -mas
(Zoology) a sessile hydra-like individual representing the polyp stage of scyphozoans. It produces forms which become free-swimming jellyfish
[C19: from Greek skuphos cup + stoma]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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The life cycle of Chrysaora lactea Eschscholtz, 1829 (Cnidaria, Scyphozoa) with notes on the scyphistoma stage of three other species.
Some aspects of regeneration in the scyphistoma of Cassiopea (class Scyphozoa) as revealed by the use of antimetabolites and microspectrophotometry.
Selectivity in phagocytosis and persistence of symbiotic algae by the scyphistoma stage of the jellyfish Cassiopeia xamachana.