Elucidation: it is a continuant entity that depends on precisely one independent continuant for its existence. The former is dependent on the latter in the sense that, if the latter ceases to exist, then the former will as a matter of necessity cease to exist also. Definition: 'SDC' is a specifically dependent continuant = Def. 'SDC' is a continuant AND there is some independent continuant 'C' which is not a spatial region and which is such that 'SDC'-depends_on 'C' at every time 'T' during the course of existence of 'SDC'. Example of usage: the mutual dependence of the role predator and the role prey as played by two organisms in a given interaction; the shape of this hole. Source: Robert Arp, Barry Smith, and Andrew D. Spear: Building Ontologies with Basic Formal Ontology. The MIT Press Cambridge, Massachusetts London, England. ©2015 Massachusetts Institute of Technology. ISBN 978-0-262-52781-1, Glossary. https://www.ebi.ac.uk/ols4/ontologies/bfo/classes/http%253A%252F%252Fpurl.obolibrary.org%252Fobo%252FBFO_0000020