Is it farther or further?
Wolffian Wolff·i·an or wolff·i·an (wul'fē-ən)
Relating to or described by Kaspar Friedrich Wolff.
Wolff (vôlf), Kaspar Friedrich. 1733-1794.
German anatomist noted for his pioneering work in embryology. His chief work, Theoria Generationis (1759), refuted the theory of preformation, which held that the embryo is a fully formed miniature adult.