8 Words That Are Older Than You Think
hypostasis hy·pos·ta·sis (hī-pŏs'tə-sĭs)
n. pl. hy·pos·ta·ses (-sēz')
A settling of solid particles in a fluid.
A condition in which the action of one gene conceals or suppresses the action of another gene that is not its allele but that affects the same part or biochemical process in an organism.