A decoction's a method of extraction by boiling of dissolved chemicals, or herbal or plant material, which may include stems, roots, bark and rhizomes. Some 'teas' are decoctions. Likewise, the term's used colloquially in South India to refer to black coffee prepared by the traditional method. Decoctions, however, differ from most teas, infusions, or tisanes, in that decoctions are usually boiled. Etymology Dating back to 1398, from present participle stem of latin decoquere, (meaning to boil d… (More on Decoction)