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ordure |
Noun
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solid excretory product evacuated from the bowels |
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opal glass |
Noun
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a milky white translucent or opaque glass |
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optical glass |
Noun
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clear homogeneous glass of known refractive index |
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optical crown |
Noun
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optical glass of low dispersion and low refractive index |
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optical crown glass |
Noun
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optical glass of low dispersion and low refractive index |
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optical flint |
Noun
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optical glass of high dispersion and high refractive index |
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obsidian |
Noun
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acid or granitic glass formed by the rapid cooling of lava without crystallization |
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organic fertilizer |
Noun
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a fertilizer that is derived from animal or vegetable matter |
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organic fertiliser |
Noun
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a fertilizer that is derived from animal or vegetable matter |
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ottar |
Noun
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essential oil or perfume obtained from flowers |
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oil of cloves |
Noun
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essential oil obtained from cloves and used to flavor medicines |
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oil of turpentine |
Noun
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volatile liquid distilled from turpentine oleoresin |
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olibanum |
Noun
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an aromatic gum resin obtained from various Arabian or East African trees |
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oleoresin |
Noun
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a naturally occurring mixture of a resin and an essential oil |
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orthoclase |
Noun
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a white or colored monoclinic feldspar |
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oligoclase |
Noun
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any of a series of triclinic feldspars that form rocks |
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oxybutyric acid |
Noun
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hydroxy derivative of butyric acid |
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oil-hardened steel |
Noun
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steel that is quenched in oil |
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oilpaper |
Noun
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paper that has been made translucent and waterproof by soaking in oil |
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oleic acid |
Noun
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a colorless oily liquid occurring as a glyceride |
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oleo oil |
Noun
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obtained from beef fat |
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oleoresin capiscum |
Noun
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an oleoresin extracted from the capsicum pepper plant |
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oligosaccharide |
Noun
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any of the carbohydrates that yield only a few monosaccharide molecules on complete hydrolysis |
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onionskin |
Noun
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a thin strong lightweight translucent paper used especially for making carbon copies |
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onyx |
Noun
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a chalcedony with alternating black and white bands |
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opaque gem |
Noun
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a gemstone that is opaque |
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opopanax |
Noun
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an odorous gum resin formerly used in medicines |
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organophosphate |
Noun
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an insecticide that interferes with an insect's nervous system |
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organophosphate nerve agent |
Noun
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any of a series of nerve agents containing organophosphate compounds first synthesized by German chemists in 1936 |
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ormolu |
Noun
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brass that looks like gold |
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oxalacetate |
Noun
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a salt or ester of oxalacetic acid |
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oxaloacetate |
Noun
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a salt or ester of oxalacetic acid |
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oxalacetic acid |
Noun
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an acid formed by oxidation of maleic acid (as in metabolism of fats and carbohydrates) |
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oxaloacetic acid |
Noun
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an acid formed by oxidation of maleic acid (as in metabolism of fats and carbohydrates) |
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oxalate |
Noun
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a salt or ester of oxalic acid |
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oxalic acid |
Noun
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a toxic colorless crystalline organic acid found in oxalis and other plants |
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oxidase |
Noun
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any of the enzymes that catalyze biological oxidation |
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oxidation-reduction indicator |
Noun
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an indicator that shows a reversible color change between oxidized and reduced forms |
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oxide |
Noun
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any compound of oxygen with another element or a radical |
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oxidoreductase |
Noun
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an enzyme that catalyzes oxidation-reduction |
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oxime |
Noun
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any compound containing the group -C=NOH |
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oxyacetylene |
Noun
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a mixture of oxygen and acetylene |
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oxyacid |
Noun
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any acid that contains oxygen |
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oxygen acid |
Noun
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any acid that contains oxygen |
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oxygenase |
Noun
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an oxidoreductase that catalyzes the incorporation of molecular oxygen |
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ozone |
Noun
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a colorless gas (O3) soluble in alkalis and cold water |
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ola |
Noun
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leaf or strip from a leaf of the talipot palm used in India for writing paper |
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olla |
Noun
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leaf or strip from a leaf of the talipot palm used in India for writing paper |
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oakum |
Noun
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loose hemp or jute fiber obtained by unravelling old ropes |
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octane |
Noun
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any isomeric saturated hydrocarbon found in petroleum and used as a fuel and solvent |