Esophageal cancer describes the disease where cells that line the esophagus change or mutate and become malignant. These cells grow out of control and form a mass or tumor. There are two main types of esophageal cancer:
Trajectory. A trajectory is the path that a moving object follows through space as a function of time. The object might be a projectile or a satellite, for example. It thus includes the meaning of orbitâthe path of a planet, an asteroid or a comet as it travels around a central mass.
The definition of a path is a trail, route, course or a line of movement. 1  An example of a path is what deer follow through the forest. 2  An example of a path is what hikers follow up a mountain. 3  An example of a path is the direction taken by a tornado.  An example of path is the vapor left behind a plane in the sky.