The Collaborative International Dictionary
Jetty head
Jetty \Jet"ty\, n.; pl. Jetties. [F. jet['e]e a pier, a jetty, a causeway. See Jet a shooting forth, and cf. Jutty.]
(Arch.) A part of a building that jets or projects beyond the rest, and overhangs the wall below.
A wharf or pier extending from the shore.
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(Hydraul. Engin.) 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 head (Naut.), a projecting part at the end of a wharf; the front of a wharf whose side forms one of the cheeks of a dock.