Webster's Revised Unabridged Dictionary · 1913

Tonga

Tonga , noun

(Medicine) A drug useful in neuralgia, derived from a Fijian plant supposed to be of the aroid genus Epipremnum.

Tonga , noun

[Hind. tāngā, Sanskrit tamaṅgaka.]

A kind of light two-wheeled vehicle, usually for four persons, drawn by ponies or bullocks. [India]