| abstract | (noun) a concept or idea not associated with any specific instance | Synonyms: abstraction |
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| (noun) a sketchy summary of the main points of an argument or theory | Synonyms: outline, precis, synopsis |
| bract | (noun) a modified leaf or leaflike part just below and protecting an inflorescence | - |
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| cataphract | (noun) armor that protects the wearer's whole body | Synonyms: body armor, body armour, coat of mail, suit of armor, suit of armour |
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| cataract | (noun) a large waterfall; violent rush of water over a precipice | - |
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| (noun) an eye disease that involves the clouding or opacification of the natural lens of the eye | - |
| contract | (noun) a variety of bridge in which the bidder receives points toward game only for the number of tricks he bid | Synonyms: contract bridge |
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| (noun) a binding agreement between two or more persons that is enforceable by law | - |
| (noun) (contract bridge) the highest bid becomes the contract setting the number of tricks that the bidder must make | Synonyms: declaration |
| extract | (noun) a passage selected from a larger work | Synonyms: excerpt, excerption, selection |
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| (noun) a solution obtained by steeping or soaking a substance (usually in water) | Synonyms: infusion |
| subcontract | (noun) a contract assigning to another party some obligations of a prior contract | - |
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| tesseract | (noun) the four-dimensional analogue of a cube | - |
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| tract | (noun) a bundle of myelinated nerve fibers following a path through the brain | Synonyms: nerve pathway, nerve tract, pathway |
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| (noun) a system of body parts that together serve some particular purpose | - |
| (noun) a brief treatise on a subject of interest; published in the form of a booklet | Synonyms: pamphlet |
| (noun) an extended area of land | Synonyms: parcel, parcel of land, piece of ground, piece of land |