marseille Heavy cotton fabric with a raised pattern of stripes or figures. meatus Body opening or passage, such as the opening of the ear or the urethra. menorrhagia Unusually heavy or extended menstrual flow. menstruum Solvent used to extract compounds from plant and animal tissues and preparing drugs. messaline Lightweight, soft, shiny silk cloth with a twilled or satin weave. mezereon Poisonous Eurasian ornamental shrub (Daphne mezereum) with fragrant lilac-purple flowers and small scarlet fruit. The dried bark of this plant was used externally as a vesicant (blistering agent) and internally for arthritis. miliary Appearance of millet seeds. Small skin lesions with the appearance of millet seeds. mullein Eurasian plants of the genus Verbascum, especially V. thapsus. Also called flannel leaf, velvet plant. muriate Chloride; compound of chlorine with another element or radical; especially, a salt or ester of hydrochloric acid called. myrrh Aromatic gum resin from trees and shrubs of the genus Commiphora of India, Arabia, and eastern Africa, used in perfume and incense. methyl salicylate Liquid ester C8H8O3 obtained from the leaves of wintergreen (Gaultheria procumbens) or the bark of a birch (Betula lenta); now made synthetically, and used as a flavoring and a counterirritant. motherwort Eurasian plants of the genus Leonurus, especially L. cardiaca, a weed having clusters of small purple or pink flowers. mugwort Aromatic plants of the genus Artemisia, especially A. vulgaris, native to Eurasia; used as a condiment. mustard plaster (sinapism) Medicinal plaster made with a paste-like mixture of powdered black mustard, flour, and water, used as a counterirritant. nephritis Various acute or chronic inflammations of the kidneys, such as Bright's disease. naphthalene (naphthaline, tar camphor) White crystalline compound, C10H8, derived from coal tar or petroleum and used in manufacturing dyes, moth repellents, and explosives and as a solvent. nebulize To convert a liquid to a fine spray; atomize. To treat with a medicated spray. nainsook Soft lightweight muslin used for babies. Neroli An essential oil made by distilling the flowers of the orange; it is used in perfume. nitre (niter, saltpeter) Potassium nitrate, KNO3, used in making gunpowder. nux vomica Tree (Strychnos nux-vomica) native to southeast Asia, having poisonous seeds that are the source of the medicinal alkaloids strychnine and brucine. ocher (ochre) Yellow, brown, or red mineral oxides of iron used as pigments. oil of vitriol Sulfuric acid; highly corrosive, dense, oily liquid, H2SO4, colorless to dark brown depending on its purity and used to manufacture a wide variety of chemicals and materials including fertilizers, paints, detergents, and explosives.