From The Collaborative International Dictionary of English v.0.48:
Tael \Tael\, n. [Malay ta[i^]l, a certain weight, probably fr.
Hind. tola, Skr. tul[=a] a balance, weight, tul to weigh.]
A denomination of money, in China, worth nearly six shillings
sterling, or about a dollar and forty cents; also, a weight
of one ounce and a third. [Written also tale.]
[1913 Webster] Taen