| 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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| aldehyde | (noun) any of a class of highly reactive chemical compounds; used in making resins and dyes and organic acids | - |
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| aldehydic | (adjective) of or related to or containing aldehydes | - |
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| dehisce | (verb) burst or split open | - |
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| dehiscence | (noun) (biology) release of material by splitting open of an organ or tissue; the natural bursting open at maturity of a fruit or other reproductive body to release seeds or spores or the bursting open of a surgically closed wound | - |
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| dehiscent | (adjective) (of e.g. fruits and anthers) opening spontaneously at maturity to release seeds | - |
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| dehorn | (verb) take the horns off (an animal) | - |
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| (verb) prevent the growth of horns of certain animals | - |
| dehumanisation | (noun) the act of degrading people with respect to their best qualities | Synonyms: dehumanization |
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| dehumanise | (verb) make mechanical or routine | Synonyms: dehumanize |
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| (verb) deprive of human qualities | Synonyms: dehumanize |
| dehumanised | (adjective) divested of human qualities or attributes | Synonyms: dehumanized, unhuman |
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| dehumanization | (noun) the act of degrading people with respect to their best qualities | Synonyms: dehumanisation |
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| dehumanize | (verb) make mechanical or routine | Synonyms: dehumanise |
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| (verb) deprive of human qualities | Synonyms: dehumanise |
| dehumanized | (adjective) divested of human qualities or attributes | Synonyms: dehumanised, unhuman |
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| dehumidifier | (noun) an appliance to extract moisture from the air and make the environment more comfortable | - |
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| dehumidify | (verb) make less humid | - |
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| dehydrate | (verb) lose water or moisture | Synonyms: desiccate, dry up, exsiccate |
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| (verb) remove water from | Synonyms: desiccate |
| (verb) preserve by removing all water and liquids from | Synonyms: desiccate |
| dehydrated | (adjective) preserved by removing natural moisture | Synonyms: desiccated, dried |
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| (adjective) suffering from excessive loss of water from the body | - |
| dehydration | (noun) the process of extracting moisture | Synonyms: desiccation, drying up, evaporation |
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| (noun) dryness resulting from the removal of water | Synonyms: desiccation |
| (noun) depletion of bodily fluids | - |
| dehydrogenate | (verb) remove hydrogen from | - |
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| dehydroretinol | (noun) a viscous alcohol that is less active in mammals than is vitamin A1 | Synonyms: vitamin A2 |
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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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| glyceraldehyde | (noun) a sweet crystalline aldehyde formed by the breakdown of sugars | Synonyms: glyceric aldehyde |
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| hobbledehoy | (noun) an awkward bad-mannered adolescent boy | - |
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| indehiscent | (adjective) (of e.g. fruits) not opening spontaneously at maturity to release seeds | - |
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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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