| acidimetry | (noun) volumetric analysis using standard solutions of acids to measure the amount of a base present | - |
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| ceftazidime | (noun) a parenteral cephalosporin (trade names Fortaz and Tazicef) used to treat moderate infections | Synonyms: Fortaz, Tazicef |
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| condiment | (noun) a preparation (a sauce or relish or spice) to enhance flavor or enjoyment | - |
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| dime | (noun) street name for a packet of illegal drugs that is sold for ten dollars | Synonyms: dime bag |
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| (noun) a United States coin worth one tenth of a dollar | - |
| dimenhydrinate | (noun) antihistamine and antiemetic (trade name Dramamine) used to treat motion sickness | Synonyms: Dramamine |
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| dimension | (noun) the magnitude of something in a particular direction (especially length or width or height) | - |
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| (noun) magnitude or extent | Synonyms: proportion |
| (noun) a construct whereby objects or individuals can be distinguished | Synonyms: attribute, property |
| (noun) one of three Cartesian coordinates that determine a position in space | - |
| dimensionality | (noun) the spatial property of having dimensions | - |
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| dimer | (noun) a compound whose molecules are composed of two identical monomers | - |
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| dimethylglyoxime | (noun) a compound used in analysis as a precipitant for palladium or nickel | - |
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| dimetrodon | (noun) carnivorous dinosaur of the Permian in North America having a crest or dorsal sail | - |
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| diminuendo | (noun) (music) a gradual decrease in loudness | Synonyms: decrescendo |
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| diminution | (noun) the act of decreasing or reducing something | Synonyms: decrease, reduction, step-down |
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| (noun) the statement of a theme in notes of lesser duration (usually half the length of the original) | - |
| (noun) change toward something smaller or lower | Synonyms: decline |
| diminutive | (noun) a word that is formed with a suffix (such as -let or -kin) to indicate smallness | - |
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| diminutiveness | (noun) the property of being very small in size | Synonyms: minuteness, petiteness, tininess, weeness |
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| dimity | (noun) a strong cotton fabric with a raised pattern; used for bedcovers and curtains | - |
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| dimmer | (noun) a rheostat that varies the current through an electric light in order to control the level of illumination | - |
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| dimness | (noun) the property of lights or sounds that lack brilliance or are reduced in intensity | Synonyms: subduedness |
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| (noun) the quality of being dim or lacking contrast | Synonyms: faintness |
| (noun) the state of being poorly illuminated | Synonyms: duskiness |
| dimorphism | (noun) (biology) the existence of two forms of individual within the same animal species (independent of sex differences) | - |
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| (noun) (chemistry) the property of certain substances that enables them to exist in two distinct crystalline forms | - |
| dimout | (noun) darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft) | Synonyms: blackout, brownout |
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| dimple | (noun) a small natural hollow in the cheek or chin | - |
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| (noun) any slight depression in a surface | - |
| (noun) a chad that has been punched or dimpled but all four corners are still attached | Synonyms: dimpled chad, pregnant chad |
| dimwit | (noun) a stupid incompetent person | Synonyms: doofus, half-wit, nitwit |
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| embodiment | (noun) giving concrete form to an abstract concept | - |
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| (noun) a concrete representation of an otherwise nebulous concept | Synonyms: shape |
| (noun) a new personification of a familiar idea | Synonyms: avatar, incarnation |
| impediment | (noun) any structure that makes progress difficult | Synonyms: impedimenta, obstructer, obstruction, obstructor |
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| (noun) something immaterial that interferes with or delays action or progress | Synonyms: balk, baulk, check, deterrent, handicap, hinderance, hindrance |
| impedimenta | (noun) the baggage and equipment carried by an army | - |
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| (noun) any structure that makes progress difficult | Synonyms: impediment, obstructer, obstruction, obstructor |
| multidimensionality | (noun) The property of having many aspects or facets. | - |
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| pediment | (noun) a triangular gable between a horizontal entablature and a sloping roof | - |
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| rudiment | (noun) the remains of a body part that was functional at an earlier stage of life | - |
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| rudiments | (noun) the elementary stages of any subject (usually plural) | Synonyms: alphabet, first principles |
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| (noun) a statement of fundamental facts or principles | Synonyms: basics |
| sediment | (noun) matter that has been deposited by some natural process | Synonyms: deposit |
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| sedimentation | (noun) the phenomenon of sediment or gravel accumulating | Synonyms: alluviation, deposit |
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| subdimension | (noun) a partial dimension that constitutes the entire dimension of a given object. | - |
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