Geology, Mineralogya soft, white, powdery substance made of limestone.
a solid piece of chalk or chalklike substance for marking or writing on a blackboard.
v.[~ + object]
to apply with chalk:He chalked a few numbers on the blackboard.
chalk up,
[~ + up + object] to score or earn, such as points in a game: gain:chalked up several victories in a row pitching for the Tigers.
[~ + up + object + to + object] to give as a reason; attribute:Chalk up that bad episode to lack of experience.[ ~ + obj + up + to + obj]:Chalk it up to lack of experience.
a soft fine-grained white sedimentary rock consisting of nearly pure calcium carbonate, containing minute fossil fragments of marine organisms, usually without a cementing material
a piece of chalk or a substance like chalk, often coloured, used for writing and drawing on a blackboard
as alike as chalk and cheese, as different as chalk and cheese ⇒ totally different in essentials
by a long chalk ⇒ by far
not by a long chalk ⇒ by no means; not possibly
(modifier)made of chalk
to draw or mark (something) with chalk
(transitive)to mark, rub, or whiten with or as if with chalk
Etymology: Old English cealc, from Latin calx limestone, from Greek khalix pebbleˈchalkˌlikeˈchalkyˈchalkiness
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