1. Development of a disease in an organism from the time of infection until the first symptoms appear: legionella incubation lasts about ten days until the symptoms of pneumonia. 2 Development hidden or little-known movement political, cultural, religious or social, rather than begin to become important and manifest itself in its entirety: during the last years of the dictatorship began the incubation of the democracy movement. 3. Development of an embryo in an egg placed by an oviparous animal through its maintenance at a temperature of natural or artificial means constant heat content.