What is "ichthys"

Ichthys \Ich"thys\, n. [NL., fr. Gr. 'ichqy`s a fish.] Same as Ichthus.

n. A stylized representation of a fish, used as a Christian symbol

The ichthys or ichthus , from the Greek ikhthýs (, " fish"), is a symbol consisting of two intersecting arcs, the ends of the right side extending beyond the meeting point so as to resemble the profile of a fish. It was used by early Christians as a secret Christian symbol and now known colloquially as the "sign of the fish" or the "Jesus fish".