dermoid cyst - a cystic tumor (usually benign) with an epithelium-lined wall and a cavity containing other material

galactocele - a cystic tumor containing milk or a milky substance (especially in the mammary glands)

blood cyst, hematocyst, hemorrhagic cyst - a cyst containing blood

hydatid - cyst filled with liquid; forms as a result of infestation by tapeworm larvae (as in echinococcosis)

nabothian cyst, nabothian follicle - a cyst that forms in the nabothian glands of the uterine cervix

ovarian cyst - a cystic tumor (usually benign) of the ovary

ranula - a cyst on the underside of the tongue

pilar cyst, sebaceous cyst, steatocystoma, wen - a common cyst of the skin; filled with fatty matter (sebum) that is secreted by a sebaceous gland that has been blocked

pathology - any deviation from a healthy or normal condition

dacryocyst, lacrimal sac, tear sac - either of the two dilated ends of the lacrimal ducts at the nasal ends of the eyes that fill with tears secreted by the lacrimal glands

dictyosome, Golgi apparatus, Golgi body, Golgi complex - a net-like structure in the cytoplasm of animal cells (especially in those cells that produce secretions)

sac - a structure resembling a bag in an animal

bleb, blister, bulla - (pathology) an elevation of the skin filled with serous fluid

follicle - any small spherical group of cells containing a cavity

liposome - an artificially made microscopic vesicle into which nucleic acids can be packaged; used in molecular biology as a transducing vector

seminal vesicle - adds nutrient fluid to semen during ejaculation