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 v
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used as a stimulant to the nervous system and as an appetite suppressant n 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 v write, draw, or trace with chalk
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as of words on a blackboard
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as of words on a blackboard v soak up with a sponge v gather sponges, in the ocean
