Before revision: Tetradactyly Tetradactyly (from Greek "four") is the condition of having four digits on a limb, as in many amphibians, birds , and theropod dinosaurs.
After revision: Tetradactyly Tetradactyly (from Greek "four") is the condition of having four digits on a limb, as in many birds, amphibians , and theropod dinosaurs.