tract
n 1: an extended area of land [syn: {piece of land}, {piece of
ground}, {parcel of land}, {parcel}]
2: a system of body parts that together serve some particular
purpose
3: a brief treatise on a subject of interest; published in the
form of a booklet [syn: {pamphlet}]
4: a bundle of nerve fibers following a path through the brain
[syn: {nerve pathway}, {nerve tract}, {pathway}]