mat·cha 
(mächə)
(mächə)n.
1. Powdered green tea, used in Japanese tea ceremonies and as a flavoring for sweets and sweet drinks.
2. Tea prepared by mixing such powder with hot water.
[Japanese (now written with the kanji for matsu, to rub, grind + cha, tea) : matsu, end, tip, fine powder, dust (from Early Middle Chinese mat; also the source of Mandarin mò, end, tip, nonessentials) + cha, tea; see CHANOYU.]