a. and sb. [mod. f. Gr. κύστις bladder, CYST + -OID: in mod.F. cystoïde.]

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  A.  adj. 1. Path. Of the nature of a cyst.

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1871.  T. Holmes, Syst. Surg. (ed. 2), V. 256. Cystoid formations.

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1874.  Jones & Siev., Pathol. Anat., 155. Cystoid Tumours.

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  2.  Geol. Belonging to the order Cystoidea of fossil echinoderms: see CYSTID.

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1876.  Page, Adv. Text-Bk. Geol., xiii. 224. Among the echinoderms a few crinoid and cystoid forms.

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  B.  sb. Path. A cystoid formation; = CYST 2.

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1872.  T. G. Thomas, Dis. Women, 648. The cystoids of the ovary.

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  Hence Cystoidean a. = CYSTOID a. 2; sb. A member of the Cystoidea.

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