kratom

[ krey-tuhm, krot-uhm ]

noun

1. a Southeast Asian evergreen tree (Mitragyna speciosa) of the coffee family, whose leaves contain a psychoactive substance.
2. the leaves of Mitragyna speciosa, or the psychoactive substance they contain: used in various forms as a mood enhancer, pain reliever, etc., or in higher doses as a sedative with opioid-like effects.

Word History and Origins

Origin of kratom¹

First recorded in 1920–25; from Thai krathom