tract has definitions from the fields of zoology,anatomy,writing,geography
1
[ noun ] (zoology) a system of body parts that together serve some particular purpose

Used in print

(J. W. C. Hagstrom et al., "Debilitating muscular...)

The heart weighed 510 gm. , and at the outflow tracts the left and right_ventricles measured 19 and 3 mm. , respectively .

2
[ noun ] (geography) an extended area of land

Used in print

(W. E. B. DuBois, Worlds of Color....)

After looking about a_bit , Wilson discovered beyond Black_Bottom , across the river and far removed from the white city , a considerable tract of land , and it occurred to him that the church and the better Negro homes might gradually be moved to this plot .

3
[ noun ] (writing) a brief treatise on a subject of interest; published in the form of a booklet

Synonyms

pamphlet

Used in print

(H. A. Gleason, "Review of African language studies...)

But it would seem more intended as a tract advocating the prosodic theory than a paper directed to the specific problems of Igbo phonology .

Related terms

treatise

4
[ noun ] (anatomy,zoology) a bundle of nerve fibers following a path through the brain
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