wing bar

noun4

1. •
   A band of contrasting color or of feathers with a distinct appearance that crosses a bird's wing.

   • The chin and throat are also white, like the wing bar, which is strikingly visible in flight. — 1980
2. •
   A support strut on for the wing of an airplane.

   • The difference between the angles of the upper approach slope and lower approach slope can never be less than the angular depth of the transition sector of the middle wing bar. — 1990
3. •
   A sand bar or spit at the side of a river, bay, or harbor.

   • The harbour entrance is the result of the inability of the shore drift to build a complete wing bar because of the scour created by the great tidal range in this area. — 1970
4. •
   One of two shallow bars on either side of the flue of a small boiler, designed to fill the space resulting from the extreme curvature of the flue.

   • ...the tendency is to wedge the metal sheets which compose the flume between the wings of the inner or wing bar. — 1913