1. An extended area of land
   "They inherited a large tract from their grandparents";
   - piece of land, piece of ground, parcel of land, parcel
    
2. A system of body parts that together serve some particular purpose
   "The digestive tract includes organs from the mouth to the anus"
    
3. A bundle of myelinated nerve fibers following a path through the brain
   "The optic radiation is a tract that carries visual information";
   - nerve pathway, nerve tract, pathway
    
4. A brief treatise on a subject of interest; published in the form of a booklet
   "The political candidate distributed tracts outlining his policy proposals";
   - pamphlet

Sounds like: toxin, t, tract, t

Derived forms: tracts

Type of: geographic area, geographic region, geographical area, geographical region, substantia alba, system, treatise, white matter

Encyclopedia: Tract