ῥίζωσις

A. taking root, Thphr. CP 2.12.5, 8.1.3; ῥ. λαμβάνειν Plu. Publ. 8: metaph., of the formation of the embryo, ὀμφαλὸς ‐ώσιος ἀρχά Philol. 13; ἡ τῶν γεννωμένων ῥ. Plu. Lyc. 14; origin of veins and arteries, Hp. Alim. 31.