ῥᾶ
κάμψαι διαύλου θάτερον κῶλον πάλιν → bend back along the second turn of the race, turning the bend and coming back for the second leg of the double run, run the homeward course, retrace one's steps
English (LSJ)
Adv.
A easily, Alcm.42, S.Fr.1086, Ion Trag.66. [Codd. vary between ῥᾶ and ῥᾴ; only ῥᾴ (ῥάι) seems to be admitted by A.D.Adv. 156.8, Eust.163.20, but ῥᾶ is prob. correct Attic and Dor. for Ρᾱᾰ whence Ep. Ρῆα (written ῥεῖα in Hom. but ῥήα in Alc.Supp.12.7), later Ion. ῥέα (q.v.); cf. Aeol. βρᾷ.]
ῥᾶ, τό,
A rhubarb, Rheum officinale, Dsc.3.2; growing near the river Rha (mod. Volga), whence its name acc. to Amm.Marc.22.8.28; cf. ῥῆον.
German (Pape)
[Seite 829] τό, die Wurzel ciner Pflanze aus dem Geschlechte Rheum, in welches unser Rhabarber gehört, Diosc.; nach einem Fluß in Pontus benannt, Amm. Marcell. 22, 8, dah. rha Ponticum.