In physics it is the growth of an object or body by the addition of matter, as in mineral deposits or continents. Also in astrophysics is the effect that occurs in a black hole that is continuously trapping matter, radiation and energy.
specifiction-refers to the expression : growth by juxtaposition of the calculated concretions, that is, there is an increase in size by addition of external materials, such as sediments that are incorporated into a
Accretion: Growth by addition of material.