|the offspring of a zebra and a donkey.|
|a scrap or morsel of food left at a meal.|
|1.||an extended area, as of land|
|2.||anatomy a system of organs, glands, or other tissues that has a particular function: the digestive tract|
|3.||a bundle of nerve fibres having the same function, origin, and termination: the optic tract|
|4.||archaic an extended period of time|
|[C15: from Latin tractus a stretching out, from trahere to drag]|
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.