ῥῦμα

English (LSJ)

(A), ατος, τό, (ἐρύω (A))

   A that which is drawn:    1 τόξου ῥ., i.e. the Persian archers, opp. λόγχης ἰσχύς, i.e. the Greek spearmen, A.Pers.147 (anap.); ἐκ τόξου ῥύματος from the distance of a bow-shot, X.An.3.3.15; ἐς τόξου ῥ. Eun.Hist.p.271D.    2 towing-line, Plb. 1.26.14, 3.46.5, al., D.H.3.44.
ῥῦμα (B), ατος, τό, (ἐρύω (B))

   A defence, protection, βωμὸς φυγάσιν ῥ. A. Supp.85 (lyr.); ἅπασι κοινὸν ῥ. δαιμόνων ἕδρα E.Heracl.260; πύργου ῥ. a tower of defence, S.Aj.159 (anap.): c. gen. objecti, defence against, [θάνατος] μέγιστον ῥ. τῶν πολλῶν κακῶν A.Fr.353; ῥύματα,= βοηθήματα, Hp. ap. Gal.19.136; cf. ῥύσιον.