名詞 cistern:

1. a sac or cavity containing fluid especially lymph or cerebrospinal fluid
   同義詞：cisterna
2. a tank that holds the water used to flush a toilet
   同義詞：water tank
3. an artificial reservoir for storing liquids; especially an underground tank for storing rainwater

1. The cistern empties in five minutes.
   貯水池五分鐘就流乾。
2. A large vessel, such as a tub, cistern, or barrel, used to hold or store liquids.
   大桶; 大盆; 缸一種大容器，如大盆、水箱或大桶，用來裝或貯存液體
3. Water in the cistern is full.
   貯水池的水是滿的。

cis.tern

n.（名詞）
A receptacle for holding water or other liquid, especially a tank for catching and storing rainwater.
蓄水池：容納水或其它液體的一種容器，特指匯集和貯存雨水的水箱
Anatomy A cisterna.
【解剖學】 水塘，池子

來源：
Middle English cisterne
中古英語 cisterne
from Latin cisterna
源自 拉丁語 cisterna
from cista [box]
源自 cista [盒]
from Greek kistô [basket]
源自 希臘語 kistô [籃]

【引伸】
cistern.al