Outgrowth of one organ from another;
Epidermal outgrowth (Lawrence, 1951).
This text discusses the phenomenon of an outgrowth that occurs on the surface of an organ, such as a stem or leaf, which is commonly referred to as a “gall.” In the field of plant pathology, a gall is regarded as an abnormal outgrowth that can be caused by a variety of factors, including insects, fungi, bacteria, or viruses.