What is the meaning of Tael?

Any of several units of measure used in China and elsewhere in eastern Asia, approximately 40 grams, and metricated in Mainland China as exactly 50 grams.

Any of several monetary units equal to the equivalent weight in silver.

leung, a traditional unit of weight, in modern usage legally defined as 1/16 of a catty or kan (斤) or 0.0377993638 kilograms