The round kumquat, also known as the Nagami kumquat, is a small, citrus fruit that is native to Southeast Asia. It is commonly used in cooking and can be eaten raw, as well as used to flavor drinks and desserts. While "round kumquat" is the most commonly used term to describe this fruit, there are several synonyms that can be used interchangeably. These include "marumi kumquat," "kinkan," "cumquat," and "fortunella japonica." Regardless of what term is used, the round kumquat is a delicious and versatile fruit that can add a unique flavor to any dish.