ichthusyoudaoicibaDictYouDict[ichthus 词源字典]
"An image of a fish used as a symbol of Christianity", From Greek ikhthus 'fish', an early symbol of Christianity: the initial letters of the word are sometimes taken as short for Iesous Christos, Theou Uios, Soter (Jesus Christ, son of God, saviour).[ichthus etymology, ichthus origin, 英语词源]