decoction of tea; brewed tea; tea infusion
Refers to tea made by boiling or steeping tea leaves, often in a medicinal or traditional context. Not the everyday word for brewed tea (which is usually お茶 or 紅茶).
In traditional Chinese medicine, one may be advised to drink a decoction of tea.
This brewed tea is a bit bitter, but it is said to be good for the body.
Standard kanji spelling.
Mixed kana-kanji spelling sometimes seen.
Compound of 煎じ (senji, 'decocting, boiling to extract') + 茶 (cha, 'tea'). The exact historical origin is uncertain, but the term is used in traditional medicine and herbal contexts.