vesica piscis

[ vuh-sahy-kuh pahy-sis, pis-is; vuh-see-kuh pis-kis, ves-i-kuh ]
/ vəˈsaɪ kə ˈpaɪ sɪs, ˈpɪs ɪs; vəˈsi kə ˈpɪs kɪs, ˈvɛs ɪ kə /

noun Fine Arts.

an elliptical figure in pointed form, usually one made by the intersection of two arcs and used, especially in early Christian art, as an emblem of Christ.

Origin of vesica piscis

First recorded in 1800–10, vesica piscis is from the New Latin word vēsīca piscis literally, bladder of a fish