| cisco | (noun) important food fish of cold deep lakes of North America | Synonyms: Coregonus artedi, lake herring |
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| (noun) cold-water fish caught in Lake Superior and northward | Synonyms: lake herring |
| cistern | (noun) an artificial reservoir for storing liquids; especially an underground tank for storing rainwater | - |
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| (noun) a tank that holds the water used to flush a toilet | Synonyms: water tank |
| (noun) a sac or cavity containing fluid especially lymph or cerebrospinal fluid | Synonyms: cisterna |
| cisterna | (noun) a sac or cavity containing fluid especially lymph or cerebrospinal fluid | Synonyms: cistern |
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| cistron | (noun) (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity | Synonyms: factor, gene |
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