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Definition of: cistern
Our photo definition of cistern 
(sis′tərn) noun
1. A reservoir, usually of masonry, wood, or metal, for storing water or other liquids; also, any natural reservoir.
2. Any analogous receptacle in which fluid is stored.
3. Anat. A large lymph space; a sac. [<OF cisterne <L cisterna <cista chest]
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