,| 1. | an expanse or area of land, water, etc.; region; stretch. |
| 2. | Anatomy.
|
| 3. | a stretch or period of time; interval; lapse. |
| 4. | Roman Catholic Church. an anthem consisting of verses of Scripture, sung after the gradual in the Mass from Septuagesima until the day before Easter and on certain other occasions, taking the place of the alleluias and the verse that ordinarily accompany the gradual. |
| 5. | Ornithology. a pteryla. |

tract (trākt)
n.
An elongated assembly of tissue or organs having a common origin, function, and termination, or a serial arrangement having a common function.
A bundle of nerve fibers having a common origin, termination, and function.