A change in the genetic structure that is not inherited from a parent, and also not passed to offspring, is called a somatic mutation

http://aims.fao.org/aos/agrovoc/xDef_8aabb0b4

xsd:dateTime 2018-08-16T14:03:48Z
rdf:langString A change in the genetic structure that is not inherited from a parent, and also not passed to offspring, is called a somatic mutation

data from the linked data cloud