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.
omentum
Folds of the peritoneum (membrane lining the abdominal cavity) that
connect the stomach with other abdominal organs.
ophthalmia neonatorum (infantile purulent conjunctivitis)
Various forms of conjunctivitis in newborns, usually contracted during
birth from passage through the infected birth canal of the mother.
orchitis
Inflammation of the testes, often the result of mumps or other
infection, trauma, or metastasis.
organdy (organdie)
Stiff transparent fabric of cotton or silk, used for trim, curtains, and
light apparel.
Origanum
Marjoram. Genus of mint-like plants (Origanum). The sweet marjoram (O.
Majorana) is aromatic and fragrant, and used in cooking. The wild
marjoram of Europe and America (O. vulgare) is less fragrant.
orris
Several species of iris with a fragrant rootstock, especially Iris
germanica, used in perfumes and cosmetics.
panada
Paste or gruel of bread crumbs, toast, or flour combined with milk,
stock, or water; used for soups or thickening sauces.