Kava n. : A species of Macropiper (M. methysticum), the long pepper, from the root of which an intoxicating beverage is made by the Polynesians, by a process of mastication; also, the beverage itself.

Example:
What form of Kava should I take, in order to experience the most potent effect?

Taxonomy
kava, kava plant, kavalactones, plant, Piper methysticum, Kava root, kava extracts, stems, strains, pill, Kava kava, Fiji, Articles with unsourced statements, leaves, consumption, kavalactone, kava products, pulp.

Defination from the web:
Kava (Piper methysticum) (Piper Latin for "pepper", methysticum Greek for "intoxicating") is an ancient crop of the western Pacific. Other names for kava include ʻawa (Hawaiʻi), 'ava (Samoa), yaqona (Fiji), and sakau (Pohnpei) ...