"cisterns" in the noun sense
1. cisterna, cistern
a sac or cavity containing fluid especially lymph or cerebrospinal fluid
2. cistern, water tank
a tank that holds the water used to flush a toilet
an artificial reservoir for storing liquids especially an underground tank for storing rainwater
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License