| acetaldehyde | (noun) a colorless volatile water-soluble liquid aldehyde used chiefly in the manufacture of acetic acid and perfumes and drugs | Synonyms: ethanal |
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| acetaldol | (noun) unsaturated aldol | - |
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| alcalde | (noun) a mayor or chief magistrate of a Spanish town | - |
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| aldehyde | (noun) any of a class of highly reactive chemical compounds; used in making resins and dyes and organic acids | - |
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| alder | (noun) north temperate shrubs or trees having toothed leaves and conelike fruit; bark is used in tanning and dyeing and the wood is rot-resistant | Synonyms: alder tree |
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| (noun) wood of any of various alder trees; resistant to underwater rot; used for bridges etc | - |
| alderfly | (noun) dark-colored insect having predaceous aquatic larvae | Synonyms: alder fly, Sialis lutaria |
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| alderman | (noun) a member of a municipal legislative body (as a city council) | - |
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| aldohexose | (noun) a monosaccharide sugar having six carbon atoms and an aldehyde group | - |
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| aldol | (noun) an oily colorless liquid obtained by the condensation of two molecules of acetaldehyde; contains an alcohol group (-OH) and an aldehyde group (-CHO) | Synonyms: aldehyde-alcohol |
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| aldose | (noun) a monosaccharide sugar that contains the aldehyde group or is hemiacetal | - |
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| aldosterone | (noun) a corticosteroid hormone that is secreted by the cortex of the adrenal gland; regulates salt (sodium and potassium) and water balance | - |
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| aldosteronism | (noun) a condition caused by overproduction of aldosterone | Synonyms: hyperaldosteronism |
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| aldotetrose | (noun) A four-carbon aldose; for example, threose, erythrose. | - |
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| aldotriose | (noun) Any aldose having three carbon atoms; in reality, just glyceraldehyde. | - |
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| baldachin | (noun) ornamented canopy supported by columns or suspended from a roof or projected from a wall (as over an altar) | - |
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| balderdash | (noun) trivial nonsense | Synonyms: fiddle-faddle, piffle |
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| baldhead | (noun) a person whose head is bald or shaved | Synonyms: baldpate, baldy, skin, skinhead |
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| baldness | (noun) the condition of having no hair on the top of the head | Synonyms: phalacrosis |
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| baldpate | (noun) a widgeon the male of which has a white crown | Synonyms: American widgeon, Anas americana |
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| (noun) a person whose head is bald or shaved | Synonyms: baldhead, baldy, skin, skinhead |
| baldric | (noun) a wide (ornamented) belt worn over the right shoulder to support a sword or bugle by the left hip | Synonyms: baldrick |
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| baldrick | (noun) a wide (ornamented) belt worn over the right shoulder to support a sword or bugle by the left hip | Synonyms: baldric |
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| baldy | (noun) a person whose head is bald or shaved | Synonyms: baldhead, baldpate, skin, skinhead |
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| caldera | (noun) a large crater caused by the violent explosion of a volcano that collapses into a depression | - |
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| caldron | (noun) a very large pot that is used for boiling | Synonyms: cauldron |
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| chaldron | (noun) a British imperial capacity measure (liquid or dry) equal to 36 bushels | - |
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| emerald | (noun) the green color of an emerald | - |
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| (noun) a transparent piece of emerald that has been cut and polished and is valued as a precious gem | - |
| (noun) a green transparent form of beryl; highly valued as a gemstone | - |
| falderol | (noun) ornamental objects of no great value | Synonyms: folderal, frill, gimcrack, gimcrackery, nonsense, trumpery |
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| formaldehyde | (noun) a colorless poisonous gas; made by the oxidation of methanol | Synonyms: methanal |
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| furfuraldehyde | (noun) a liquid aldehyde with a penetrating odor; made from plant hulls and corncobs; used in making furan and as a solvent | Synonyms: furfural |
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| garibaldi | (noun) a loose high-necked blouse with long sleeves; styled after the red flannel shirts worn by Garibaldi's soldiers | - |
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| glyceraldehyde | (noun) a sweet crystalline aldehyde formed by the breakdown of sugars | Synonyms: glyceric aldehyde |
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| herald | (noun) something that precedes and indicates the approach of something or someone | Synonyms: forerunner, harbinger, precursor, predecessor |
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| (noun) (formal) a person who announces important news | Synonyms: trumpeter |
| heraldry | (noun) emblem indicating the right of a person to bear arms | - |
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| (noun) the study and classification of armorial bearings and the tracing of genealogies | - |
| hyperaldosteronism | (noun) a condition caused by overproduction of aldosterone | Synonyms: aldosteronism |
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| officialdom | (noun) people elected or appointed to administer a government | Synonyms: government officials |
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| paraldehyde | (noun) a colorless liquid (a cyclic trimer of acetaldehyde) that is used as a sedative and a solvent | Synonyms: ethanal trimer |
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| propionaldehyde | (noun) a colorless liquid aldehyde | Synonyms: propanal |
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| ribald | (noun) a ribald person; someone who uses vulgar and offensive language | - |
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| ribaldry | (noun) behavior or language bordering on indelicacy | Synonyms: gaminess, raciness, spiciness |
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| (noun) ribald humor | - |
| scald | (noun) the act of burning with steam or hot water | - |
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| (noun) a burn cause by hot liquid or steam | - |
| thraldom | (noun) the state of being under the control of another person | Synonyms: bondage, slavery, thrall, thralldom |
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| valdecoxib | (noun) a Cox-2 inhibitor (trade name Bextra) that relieves pain and inflammation without harming the digestive tract | Synonyms: Bextra |
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| waldmeister | (noun) fragrant dark green leaves used to flavor May wine | Synonyms: sweet woodruff |
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| (noun) Old World fragrant stoloniferous perennial having small white flowers and narrow leaves used as flavoring and in sachets; widely cultivated as a ground cover; in some classifications placed in genus Asperula | Synonyms: Asperula odorata, fragrant bedstraw, Galium odoratum, sweet woodruff, woodruff |
| weald | (noun) an area of open or forested country | - |
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| zinnwaldite | (noun) a mica containing iron and lithium | - |
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