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Webster 1913 Edition

Noun.

[

Zoo-

cyst

(Biol.)

A cyst formed by certain Protozoa and unicellular plants which the contents divide into a large number of granules, each of which becomes a germ.

See also: zoöcyst

zoocyst ‎(plural zoocysts)

A variety of encysted rhizopods resembling a sporocyst, except in the thickness and number of the protective layer.