noun, plural scyphistomae [sahy-fis-tuh-mee] , scyphistomas.
a stage in the life cycle of a jellyfish or other scyphozoan when it is fixed in place and reproduces asexually to produce free-swimming medusas. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
scyphistoma (saɪˈfɪstəmə)
n , pl -mae, -mas
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 & Unabridged 10th Edition
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Example sentences
After a period of growth, a scyphistoma divides transversely to become a strobila that resembles a stack of discs.
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