variant of tcha, CHIA Obs., tea.

1

1662.  J. Davies, trans. Mandelslo’s Trav., 183. A little Pot for Tsia or The…; another greater Tsia Pot.

2

1712.  trans. Pomet’s Hist. Drugs, I. 85. The, or Tsia, is a very little Leaf, which is brought dry’d from China.

3

  Hence Tsiology (nonce-wd.), a scientific dissertation on tea.

4

1827.  (title) Tsiology: Discourse on Tea, Tea Making, History of East India Co., &c.

5