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Comprehensive
Dictionary Suite
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blackboard a smooth, hard, dark-colored panel, often made of slate and suitable for writing on with chalk; chalkboard.
blackboard eraser an object made of bound layers of felt used for erasing chalk from a blackboard.
calcite a common, soft mineral that occurs in chalk, marble, and limestone and is composed of calcium carbonate.
calcium carbonate a white crystalline compound found in chalk, limestone, marble, shells, and plant ash that is used in the manufacture of cement, paints, plastics, and polishing agents such as toothpaste.
chalk a substance derived from natural chalk that is pressed into a stick-like form and used for writing on a blackboard or drawing on pavement. [4/6 definitions]
chalkboard a smooth panel to be written on with chalk; blackboard.
chalky of, containing, or covered with chalk. [1/2 definitions]
cretaceous of, containing, or like chalk. [2 definitions]
foraminifer any of several single-celled marine organisms that have chalky cells perforated by tiny pores through which thin pseudopods protrude, and that form the chief component of chalk.
geophagy the practice of eating earthy matter such as clay or chalk, as during a famine or as a symptom of mental illness.
gypsum a mineral, hydrated calcium sulfate, that resembles chalk and is used to make plaster of Paris, plaster and wallboard, and fertilizers.
scratchboard a piece of cardboard that is covered with hard white clay or chalk and coated with ink, upon which line drawings can be made by scratching the ink to reveal the glossy white surface.
whiting2 pure white chalk, ground and washed, used to make whitewash, ink, putty, and the like.