blackboard
Physicist w:Paul DiracPaul Dirac at the blackboard.
Meanings
Noun
- A large flat surface, finished with black slate or a similar material, that can be written upon with chalk and subsequently erased; a chalkboard.
Verb
- To use a blackboard to assist in an informal discussion.
Related
Broader meaning words
Origin
- From black + board, because such surfaces were once typically made of black slate.
Modern English dictionary
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