noun an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride.
— synonyms: methamphetamine, methamphetamine_hydrochloride, Methedrine, meth, deoxyephedrine, chicken_feed, crank, glass
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.