What has been described a motor vehicle for one statutory purpose may not suit the purpose of another. In its customary meaning, a motor vehicle has the essential characteristics of a self-propelled contrivance designed for the carriage of persons or things. By definition, railway devices have been excluded.
Process in which one parent cell divides to form two single cells? That process is called Mitosis in regular cells and Meiosis in sex cells or asexual reproduction. Edit
Mitosis is the process where one cell divides into two cells with the same number of chromosomes as the original cell, while meiosis is the process where one cell divides into four cells with half the number of chromosomes as the original cell.