thumb|Portuguese Cistern (Mazagan)|Portuguese cistern (Mazagan), [[El Jadida, Morocco (1514)]] thumb|The difference between a cistern and a well is in the source of the water: A cistern collects [[fresh water where a well draws from groundwater.]]
thumb|Portuguese Cistern (Mazagan)|Portuguese cistern (Mazagan), [[El Jadida, Morocco (1514)]] thumb|The difference between a cistern and a well is in the source of the water: A cistern collects [[fresh water where a well draws from groundwater.]]
A cistern (; , ; ) is a waterproof receptacle for holding liquids, usually water. Cisterns are often built to catch and store rainwater. To prevent leakage, the interior of the cistern is often lined with hydraulic plaster.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).