flashboard

noun8

1. •
   (US) A board placed temporarily upon a dam, river, stream, etc. (typically within a permanent frame) to raise the water above its usual level.

   • A form of cheap open weir which has been commonly constructed in the West is the open wooden frame and flashboard weir. — 1909
2. •
   A board that controls the flow of any material.

   • There exists a trapezoidal groove in the bottom of each container and a flashboard fixed in feeding system which match the groove. — 2010
3. •
   Any automated display that shows temporary information.

   • With the new flashboard, a good team could concentrate on one target at a time, even in fairly heavy firing . — 1972
4. •
   An electronic display that shows the winning values in various gambling games such as keno or bingo.

   • A breakopen bingo game begins when, in the presence of players, the organization calls and posts, either manually or by use of a flashboard, a predetermined quantity of bingo numbers. — 2011
5. •
   An acrylic board used to display children's work in a school.
6. •
   A board for displaying language material in the classroom, used like a flashcard but potentially holding more information.

   • Then he comes forward, takes the flashboard V, and stands in front of the class so that all may see it . — 1932
7. •
   A sheet of material that is subjected to an electric pulse or flashover in order to produce plasma.

   • The plasma produced by the flashboard was mostly C⁺ and C⁺⁺. — 1990
8. •
   (historical) A device used in the 1920s for teaching typing skills which provided feedback on which key was pressed by lighting up the corresponding value.

   • This flashboard also is equipped with the standard layout of letters, signs, etc., each having a white spot under it, but which is conceled by a small shutter. — 1922