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
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
a pure flat white with little reflectance
a soft whitish calcite
write, draw, or trace with chalk
a block of wood used to prevent the sliding or rolling of a heavy object
as completely as possible
secure with chocks
support on chocks
