Ichthus \Ich"thus\ ([i^]k"th[u^]s), n. [Gr. 'ichqy`s.]
In early Christian and ecclesiastical art, an emblematic
fish, or the Greek word for fish, which combined the initials
of the Greek words Ihsoy^s, Christo`s, Qeoy^ Gio`s Swth`r,
Jesus, Christ, Son of God, Savior.
[1913 Webster]