E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Vesi’ca Piscis (Latin, fish-bladder).
The ovoidal frame or glory which, in the twelfth century, was much used, especially in painted windows, to surround pictures of the Virgin Mary and of our Lord. It is meant to represent a fish, from the anagram ICHTHUS. (See NOTARICA.)
