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tract | a system of body parts that together serve some particular purpose | ||
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pathway, nerve pathway, tract, nerve tract | a bundle of myelinated nerve fibers following a path through the brain | ||
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tract, pamphlet | a brief treatise on a subject of interest; published in the form of a booklet | ||
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tract, parcel, piece of land, piece of ground, parcel of land | an extended area of land |