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ῥύσις

ῥύσις, a flowing, flow

ῥύσις [ῠ], εως, ἡ, (ῥέω)
  • flow, ὕδατος Pl. Lg. 944b; εἰς τὸ κοιλότατον ἡ ῥ. Arist. Mete. 355b17; opp. ἄμπωτις, ib. 366a19; ἐκ ῥινῶν αἵματος -ιες Hp. Aph. 3.27; κοιλίης ib. 2.14; [ἐλαίου], i.e. yield of oil, Thphr. HP 4.14.10, PRev.Laws 60.16 (iii B.C.); φλεβῶν Arist. PA 668a11; of fire, Thphr. Ign. 54; shedding, τριχῶν Dsc. 2.120, Gal. 19.431; used for γονόρροια, LXX Le. 15.2 sq.
    • II course of a river, stream, ποταμὸς ποιεῖται τὴν ῥ. Plb. 2.16.6, cf. D.H. 1.9, D.S. 4.35, Str. 6.2.4.
    • III Math., [στιγμῆς] ῥύσιν φασὶν εἶναι οἱ γεωμέτραι τὴν γραμμήν (cf. ῥυΐσκομαι, ῥέω 1.5b) Iamb. in Nic. p.57 P., cf. Plot. 3.7.3, Procl. in Euc. p.97 F.; οἷον ἄστρου ῥ. Arist. Mu. 395b8.

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