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Definition of Cisterna
1. Noun. A sac or cavity containing fluid especially lymph or cerebrospinal fluid.
Definition of Cisterna
1. a fluid-containing sac [n -NAE]
Medical Definition of Cisterna
1. 1. Any cavity or enclosed space serving as a reservoir, especially for chyle, lymph, or cerebrospinal fluid. 2. An ultramicroscopic space occurring between the membranes of the flattened sacs of the endoplasmic reticulum, the Golgi complex, or the two membranes of the nuclear envelope. Synonym: cistern. Origin: L. An underground cistern for water, fr. Cista, a box (05 Mar 2000)