calamansi; calamondin
A small citrus fruit widely used in Okinawan and Southeast Asian cuisine; also known as 四季橘 or カラマンシー.
In Okinawa, calamansi juice is often used in cooking.
Calamansi is called calamansi in the Philippines.
The name 四季柑 literally means 'four-season citrus', referring to its year-round fruiting habit. The exact origin of the term is uncertain, but it is used primarily in Okinawa for this hybrid citrus.