noun
a soft whitish calcite
noun
a pure flat white with little reflectance
noun
an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride
Synonyms
Examples
- used as a stimulant to the nervous system and as an appetite suppressant
noun
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
verb
write, draw, or trace with chalk