Noun | 1. | ![]() 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 netlike structure in the cytoplasm of animal cells (especially in those cells that produce secretions) sac - a structure resembling a bag in an animal 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 |