- The dried leaves of various genera of the family Theaceae, including Thea (T. sinensis), Camellia, and Gordonia, a shrub indigenous to China, southern and southeastern Asia, and Japan. Its chief constituent, on which its stimulating action largely depends, is the alkaloid caffeine, which is present in the amount of 1–4%; theophylline, a chemically related alkaloid, is also present.
- The infusion made by pouring boiling water on tea leaves.
- Any infusion or decoction made extemporaneously.
[Chinese (Amoy dial.) t'e, Mod. L. thea]
See Also: species2