Trail

n. track, footprints; path, way

v. follow; drag, tow

TNF-related apoptosis-inducing ligand (TRAIL), in the field of cell biology, is a ligand molecule which induces the process of cell death called apoptosis. It is a type II transmembrane protein with homology to other members of the tumor necrosis factor family. In humans, the gene that encodes for TRAIL is located at chromosome 3q26.TRAIL binds to the death receptors, DR4 and DR5. The process of apoptosis is caspase-8-dependent.
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A trail is a path or road used for walking, cycling, cross-country skiing, or other activities. Some trails are off-limits to everyone other than hikers, and a few trails allow motorized vehicles.
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Trail a well-defined information pathway that leads from data point to data point and sequentially from analysis to conclusion. [more]Trail - Community and Resources

Noun
1. a track or mark left by something that has passed; "there as a trail of blood"; "a tear left its trail on her cheek"
(hypernym) path, track, course
(hyponym) slot
2. a path or track roughly blazed through wild or hilly country
(hypernym) track, cart track, cartroad
(hyponym) cattle trail
3. evidence pointing to a possible solution; "the police are following a promising lead"; "the trail led straight to the perpetrator"
(synonym) lead, track
(hypernym) evidence, grounds
Verb
1. to lag or linger behind; "But in so many other areas we still are dragging"
(synonym) drag, get behind, hang back, drop behind
(hypernym) lag, dawdle, fall back, fall behind
(derivation) dawdler, drone, laggard, lagger, trailer
2. go after with the intent to catch; "The policeman chased the mugger down the alley"; "the dog chased the rabbit"
(synonym) chase, chase after, tail, tag, give chase, dog, go after, track
(hypernym) pursue, follow
(hyponym) quest
(derivation) trailing, tracking
3. move, proceed, or walk draggingly pr slowly; "John trailed behind behis class mates"; "The Mercedes trailed behind the horse cart"
(synonym) shack
(hypernym) travel, go, move, locomote
(derivation) dawdler, drone, laggard, lagger, trailer
4. hang down so as to drag along the ground; "The bride's veiled trailed along the ground"
(verb-group) train
5. drag loosely along a surface; allow to sweep the ground; "The toddler was trailing his pants"; "She trained her long scarf behind her"
(synonym) train
(hypernym) drag
(derivation) trailer

(v. t.)
To tread down, as grass, by walking through it; to lay flat.
  

(v. t.)
To take advantage of the ignorance of; to impose upon.
  

(v. t.)
To hunt by the track; to track.
  

(v. t.)
To draw or drag, as along the ground.
  

(v. t.)
To carry, as a firearm, with the breech near the ground and the upper part inclined forward, the piece being held by the right hand near the middle.
  

(v. i.)
To grow to great length, especially when slender and creeping upon the ground, as a plant; to run or climb.
  

(v. i.)
To be drawn out in length; to follow after.
  

(n.)
The entrails of a fowl, especially of game, as the woodcock, and the like; -- applied also, sometimes, to the entrails of sheep.
  

(n.)
The act of taking advantage of the ignorance of a person; an imposition.
  

(n.)
That part of the stock of a gun carriage which rests on the ground when the piece is unlimbered. See Illust. of Gun carriage, under Gun.
  

(n.)
Anything drawn out to a length; as, the trail of a meteor; a trail of smoke.
  

(n.)
Anything drawn behind in long undulations; a train.
  

(n.)
Anything drawn along, as a vehicle.
  

(n.)
A track left by man or beast; a track followed by the hunter; a scent on the ground by the animal pursued; as, a deer trail.
  

(n.)
A frame for trailing plants; a trellis.
  

(n.)
A footpath or road track through a wilderness or wild region; as, an Indian trail over the plains.