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'Tract' may be a reference to:

★ tract (anatomy), a bundle of nerve fibers following a path through the brain, or a collection of related anatomic structures (e.g. gastrointestinal tract, genitourinary tract).

★ tract (literature), a short written work, usually of a political or religious nature;

★ tract (geography), a section of land;

★ Tract (liturgy), component of Roman Catholic liturgy, a dirge used during the season of Lent.
'Tractate' may be a reference to:

★ A section of the Mishnah and also of the Talmud.