Porcupines can NOT throw their quills. Porcupine vision is poor, but they have an excellent sense of smell. Porcupines make shrill screeches, whines, and low grunts. Porcupines are vegetarians, and they eat a large variety of plants, shrubs and trees. Baby porcupines are called porcupettes..
Freebase (0.00 / 0 votes) Rate this definition: Divergence. In vector calculus, divergence is a vector operator that measures the magnitude of a vector field's source or sink at a given point, in terms of a signed scalar. More technically, the divergence represents the volume density of the outward flux of a vector field from an infinitesimal volume around a given point. For example, consider air as it is heated or cooled. The relevant vector field for this example is the velocity of the moving air at a point.
Divergent Boundary. The first way two cars can move relative to each other is in divergent directions, like passing a car going the other way. Plates also can pull apart from each other. This is known as a divergent boundary. A divergent boundary is a fault where the two plates are moving away from each other. Rift valleys develop when a continent is broken apart by a divergent boundary. Now, as plates pull apart, several things may occur.