methamphetamine base

meth·am·phet·a·mine base

a form of methamphetamine that can be readily volatilized.
References in periodicals archive ?
In a break with prior precedent, the Federal Court of Justice in December 2008 lowered the methamphetamine threshold for a "not insignificant amount," which triggers a higher statutory minimum sentence in the Narcotics Act for methamphetamine possession, trade, and import from 30 mg to 5 mg (methamphetamine base).