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