Tadpole script or Kedou (蝌蚪文, “蝌蚪书”、“蝌蚪篆”) is a variety of Chinese seal script.
[1] Traditionally the origin is said to be that tadpole script manuscripts were first discovered when the house of Confucius was pulled down in the second century.
[2][3] The name comes from the tadpole-shape with big heads and tails of the characters.
[4] It was distinct from the insect script.
[5][6] However "tadpole script" can simply be a popular way of referring to the ancient script of the Chou period.