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Jetty

Origin: F.jetee a pier, a jetty, a causeway. See jet a shooting forth, and cf. Jutty.

1. A part of a building that jets or projects beyond the rest, and overhangs the wall below.

2. A wharf or pier extending from the shore.

3. (Science: physics) a structure of wood or stone extended into the sea to influence the current or tide, or to protect a harbor; a mole; as, the Eads system of jetties at the mouth of the Mississippi river. Jetty ad, a projecting part at the end of a wharf; the front of a wharf whose side forms one of the cheeks of a dock.