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(ŭr'tī-kă, er'ti-),
The herb, Urtica dioica (family Urticaceae); a weed, the leaves of which produce a stinging sensation when touching the skin. It has been used as a diuretic and hemostatic in metrorrhagia, epistaxis, and hematemesis.
Synonym(s): nettle
[L. a nettle, fr. uro, pp. ustus, to burn]


(1) Wheal. 
(2) Nettle (Urtica dioica), a herb.


A homeopathic remedy that may be applied topically for allergic reactions, blistering and eczema, or used internally for cystitis, gout, neuralgias, pruritus and rheumatic complaints.
References in periodicals archive ?
Phytochemical analysis of Urtica dioica leaves by fourier-transform infrared spectroscopy and gas chromatography-mass spectrometry.
Antihyperglycemic activity of the aqueous extract of Urtica dioica.
Urtica fissa was collected in July, 2005 at Anshun mountains in Guizhou Province of China, and identified by Professor Liu Cun-sheng in Beijing University of Chinese Traditional Medicine.
Urtica fissa roots and stems (50 kg) were pre-extracted with 4001 95% ethanol to remove color materials.
En la revision de los antecedentes se encontraron 78 referencias sobre la Urtica dioica, que evidencia que esta planta se ha usado con fines medicinales desde tiempos remotos ademas, reportan datos de toxicidad oral cronica que sugieren que la infusion fue bien tolerada hasta la dosis de 1310 mg/kg (Bombardelli y Marazzoni, 1997).
More recently, a prospective, randomized, placebo-controlled, double-blind trial also supported the safety and efficacy of sabal and urtica therapy.
The direct cytotoxic effect of the essential oil from Urtica dioica was shown to be concentration and time of incubation-dependent (Ilarinova et al., 1992).
Urtica dioica plants were collected from the Samsun, Turkey, in July-August (2001), during the early hours of the day.
1999), a combination of sabal fruit extract and urtica root extract promises to be effective in the treatment of BPH, as the drugs can be expected to show a synergistic effect (e.g.
Urtica dioica is recommended at a dose of 20 drops in a little water twice a day before meals.