1A small freshwater clam (family Corbiculidae), often used in miso soup and traditional dishes; commonly written in kana.
朝ご飯にしじみの味噌汁を飲んだ。
I had miso soup with shijimi clams for breakfast.
しじみは二日酔いにいいと言われる。
Shijimi clams are said to be good for hangovers.
湖でしじみを採る人がいる。
There are people who gather shijimi clams at the lake.