Black tea is a type of tea that is more oxidized than oolong, green and white teas. All four types are made from leaves of the shrub (or small tree) Camellia sinensis. Black tea is generally stronger in flavor than the less oxidized teas. Two principal varieties of the species are used – the small-leaved Chinese variety plant (C. sinensis subsp.... Found on http://en.wikipedia.org/wiki/Black_tea
a tea that has been allowed to wither and ferment under controlled conditions before being subjected to a heating process that stops fermentation and turns the leaves black. Cf. green tea. Found on https://www.infoplease.com/dictionary/black-tea