red tea

The “black tea” sense is a calque of Chinese 紅茶／红茶 (hóngchá, literally “red tea”).

red tea (countable and uncountable, plural red teas)

1. A beverage made from the rooibos plant.

   Synonyms: rooibos, rooibos tea, redbush

2. Black tea.

• green tea, pink tea, white tea, yellow tea

• redate, derate, atrede, e-trade, teared, e-dater