DECOC'TION, noun 1. The act of boiling a substance in water, for extracting its virtues. 2. The liquor in which a substance has been boiled; water impregnated with the principles of any animal or vegetable substance boiled in it; as a weak or a strong decoction of Peruvian bark.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI