said of geometrical figures or their parts: having the same relative position, value, or structure

said of organs: corresponding in structure, position, and embryologic or evolutionary origin, but different in function exhibiting biological homology

said of chromosomes: joining together with each other in pairs at meiotic cell division and having the same or corresponding sequence of genetic loci

said of chemical compounds: belonging to or consisting of a chemical series, e.g. the alkanes, whose members exhibit homology

said of a tissue graft: derived from an organism of the same species