methamphetamines

== English == === Etymology === From methamphetamine, apparently by analogy with amphetamines. === Noun === methamphetamines pl (plural only) Methamphetamine. ==== Usage notes ==== Since the term methamphetamine denotes a specific compound (one of the amphetamines), the term methamphetamines may be considered meaningless; nonetheless, it is in wide use as a synonym for methamphetamine, though less so in technical literature.