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bn:00017550n
Noun Concept
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chalk
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A piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces WordNet 3.0
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A piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces WordNet 3.0 & Open English WordNet
A soft, pure, earthy, fine-textured, usually white to light gray or buff limestone of marine origin, consisting almost wholly (90-99%) of calcite. OmegaWiki
A piece of chalk, or nowadays processed compressed gypsum, that is used for drawing and for writing on a blackboard. Wiktionary
A piece of chalk used for drawing and on a blackboard. Wiktionary (translation)
EN
The chalk written on the blackboard makes a squeaky sound. Wiktionary
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