hypericinn.
/hʌɪˈpɛrᵻsɪn/, U.S. /haɪˈpɛrəs(ə)n/ Chemistry.
A red crystalline compound that is an active principle of St John's wort, Hypericum perforatum, and is used as a mild antidepressant.Hypericin is an anthraquinone derivative. Formula: C30H14O8.
ΚΠ
1912 Chem. Abstr. 6 381 (heading) Hypericin (hypericum red).
1957 R. H. Thomson Naturally Occurring Quinones vi. 279 A number of such photodynamic substances occur naturally in plants, notably the quinone pigment hypericin.
1998 R. A. Ricker Smart Guide Vitamins & Healing Suppl. vi. 120 Another theory is that hypericin produced feelings of well-being by inhibiting serotonin reuptake in the cells.
2002 P. Thomas What works, what Doesn't x. 123 A daily oral dose of 500 to 900 mg St John's wort extract, corresponding to 1.0 to 2.7 mg total hypericin, is typically recommended.
This is a new entry (OED Third Edition, September 2006; most recently modified version published online March 2022).
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