(n) :
(organic chemistry, medicine) A red-coloured anthraquinone derivative, extracted from St. John's wort or prepared synthetically, used as an antidepressant and antiviral agent.
(n) :
(organic chemistry, medicine) A red-coloured anthraquinone derivative, extracted from St. John's wort or prepared synthetically, used as an antidepressant and antiviral agent.