jetty

Short definition from Wiktionary

Noun

1. 1
   A structure of wood or stone extended into the sea to influence the current or tide, or to protect a harbor or beach.
2. 2
   A dock or wharf extending from the shore; a pier.
3. 3
   A part of a building that jets or projects beyond the rest, and overhangs the wall below.

Verb

1. 1
   To jut out; to project.

Adjective

1. 1
   Made of jet, or like jet in color.