Within Somacentric Trajectilery, a trajectile is the irreversible material trace of a bodily trajectory passing through tool or medium into a substrate under stated conditions. It is an event-record rather than a line corrected toward a predetermined image.
Trajectile is an existing rare technical word adopted within Somacentric Trajectilery and given a specific operational meaning. It combines the sense of trajectory with the material consequence of propulsion, emphasizing movement, direction, force, and arrival rather than static line alone.
A Somacentric trajectile is not defined only by appearance. Its significance lies in the causal chain that produced it: bodily motion, tool or medium, pressure, friction, substrate resistance, collision, breakage, and continuation. The resulting trace remains materially connected to that event.
The governing rule is that the trajectile itself does not fail. Medium, substrate, or instrument may fracture or resist, but failure of the trajectile would require a predetermined image against which the result could be judged deficient. Under Preutilization, no such image governs the event. The trajectile records what occurred.