Tisane

Herbal tea, or, more properly, called tisane (UK /tɪˈzɑːn/, US /tɪˈzæn/), is any beverage made from the infusion or decoction of herbs, spices, or other plant material in hot water, and usually does not contain caffeine.

These drinks are distinguished from true teas (black, green, white, yellow, oolong, etc., which are prepared from the cured leaves of the tea plant, Camellia sinensis), as well as from decaffeinated tea, in which the caffeine has been removed. In many countries, the word ‘tea’ may only be used for leaves of Camellia sinensis and therefore the phrase ‘herbal tea’ is a contradiction in terms, and should not be used. These beverages are therefore labelled infusion or tisane.