All subtypes of a concept, including subtypes of subtypes. For example, if a concept has four children, then descendants are those children plus all the concepts that are descended from those four children. See also subtype and subtype child.
The figure below shows an example hierarchy in which concept "E" has eight subtype descendants (G, H, J, L, M, N, S and T).
Figure 1: Hierarchy Illustration - Subtype descendants