You don't even have a picture? From your description, it may be coriander or fennel. I feel that the leaves of coriander are closer to carrots. They are all Umbelliferae plants.

Coriander is a Chinese scientific name, generally called coriander, but the leaves of coriander that are often eaten are relatively large, which grow at the bottom of coriander, while the leaves that grow at the upper part are subdivided, as shown in the following figure: