Chapter Cylindraceous to Cysted of C by Webster's Dictionary (1913 Edition)

2. (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.

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

Cysted
(Cyst"ed) a. Inclosed in a cyst.