What does "cyst" mean?

Cyst: (Bot.) One of the bladders or air vessels of certain algæ, as of the great kelp of the Pacific, and common rockweeds (Fuci) of our shores. D. C. Eaton.

Additional senses

  1. 2.(Zoöl.) (a) A small capsule or sac of the kind in which many immature entozoans exit in the tissues of living animals; also, a similar form in Rotifera, etc. (b) A form assumed by Protozoa inwhich they become saclike and quiescent. It generally precedes the production of germs. See Encystment.

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