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.
trajectory (trÉdÊektÉri ) The trajectory of a moving object is the path that it follows as it moves. ...the trajectory of an artillery shell. The trajectory of something such as a person's career is the course that it follows over time. ...a relentlessly upward career trajectory.