tract

(noun) an extended area of land. Synonyms: piece of land, piece of ground, parcel of land, parcel.

(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) a bundle of myelinated nerve fibers following a path through the brain. Synonyms: nerve pathway, nerve tract, pathway.