Also found in: Medical, Encyclopedia, Wikipedia.
Related to Usnic: usnic acid, USCIS


a.1.(Chem.) Pertaining to, or designating, a complex acid obtained, as a yellow crystalline substance, from certain genera of lichens (Usnea, Parmelia, etc.).
References in periodicals archive ?
Except for usnic acid, no cytotoxic effects were observed for the two depsides (atranorin and perlatolic acid) and the alkyl depsidone (physodic acid).
The phytotoxic lichen metabolite, usnic acid, is a potent inhibitor of plant p- hydroxyphenylpyruvate dioxygenase.
Slides 16-18 of this presentation appear to show performance improvements of MRG-M when running usNIC vs.
Antiviral, antiprotozoal, antiproliferative, analgesic, anti-inflammatory and antipyretic activities of usnic acid known as secondary metabolite have been reviewed.
Usnic acid was initially used in the treatment of pulmonary tuberculosis (Plichet, 1955), and there are data regarding its biological activities as an antibiotic (Cocchietto et al.
According to their chemical structure, most lichen substances are phenolic compounds, dibenzofuranes, Usnic acids, depsidones, depsones, lactones, quinines and pulvunic acid derivatives [11].
but the latter contains methyplacodiolic and usnic acids, and ascospores with 7-10 septa (Staiger & Kalb, 1995).
Usnic acid-derivatives as potential anti-neoplastic agents.
In late March, researchers found the high levels of usnic acid found in tumbleweed shield lichen (lichens are part fungus, part algae) was the cause of the deaths.
Usnic acid is effective against streptococcus, staphylococcus, and bacteria that causes pneumonia.
Some of the supplements in question include kava, usnic acid and bitter orange (citrus aurantium).
Included among the products that will almost surely face increased scrutiny are bitter orange, or citrus aurantium; usnic acid; and aristolochic acid.