chalk

Definition

A soft, white, powdery limestone (calcium carbonate, CaCO₃).

Etymology

From Middle English chalk, chalke, from Old English ċealc, from Proto-West Germanic *kalk, borrowed from Latin calx (“limestone”), again borrowed from Ancient Greek χάλιξ (khálix, “pebble”). Doublet of calx and cauk.

Example Sentences

• "chalk cliffs are not recommended for climbing"
• "the chalk used to write on the blackboard makes a squeaky sound"
• "when working out your next move, it's a good idea to get some more chalk from the bag"

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