chalk
noun
1. a soft whitish calcite
Definition categories: substance, calcite
2. a pure flat white with little reflectance
Definition categories: attribute, white, whiteness
3. an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
Similar word(s): crank, glass, ice, meth, methamphetamine, methedrine, shabu, trash
Definition categories: man–made, amphetamine, speed, upper
4. 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
Definition categories: man–made