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n combining form
(Biology) indicating a bladder or sac: otocyst.
[from Greek kustis bladder]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014



1. any abnormal saclike growth of the body in which matter is retained.
2. a bladder, sac, or vesicle.
a. a protective capsule or spore surrounding an inactive or resting organism or a reproductive body.
b. such a capsule and its contents.
[1705–15; < New Latin cystis < Greek kýstis pouch, bladder; akin to kŷma cyma]


var. of cysto-, before a vowel: cystectomy.


var. of cysto-, as final element in a word: statocyst.
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