After the fact I would call the Assembled Multitudes' attention to
http://www.holymtn.com/teapots/yixing.htm .
Definition I turns out not to be quite so daffy after all!
(All right, so it was the Sung Dynasty, not the Han...)

See what you can infer sometimes from just the structure of a word?

No points of course because of Number Four of the Roolz.