flashboard

American  

[flash-bawrd, -bohrd] / ˈflæʃˌbɔrd, -ˌboʊrd /

noun

Civil Engineering.

1. a board, or one of a series of boards, as on a milldam, used to increase the depth of the impounded water.

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flashboard British  

/ ˈflæʃˌbɔːd /

noun

1. Also called: stop log.   stop plank.  a board or boarding that is placed along the top of a dam to increase its height and capacity

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Etymology

Origin of flashboard

First recorded in 1760–70; flash + board

Example Sentences

Therefore, a true flood curve at this point would be much flatter at the beginning and rise sharply at a period coincident with the carrying away of the flashboards.

From Project Gutenberg

The water poured over the flashboard with a splashing murmur at that distance, and ran down under the bridge in a rocky bed.

From Project Gutenberg

Thus meditating he drew nearer to the place where the flashboard was down and the water poured into the rocky river bed.

From Project Gutenberg