ῥοῦς

A. ῥόον Hp. Mul. 1.31; dat. sg. fem. ῥόῳ ib.78; gen. ῥοῦ Id. Nat.Mul. 32,34, Thphr. HP 3.18.5 (fem.), etc.; but ῥοός Hp. Mul. 2.181, Dsc. 1.108; dat. ῥοΐ interpol. in Dorio ap. Ath. 7.309f:—sumach, Rhus coriaria, Dsc. l.c.
2. its fruit, Sol. 41, Antiph. 142.2, Alex. 127.6, PCair.Zen. 83.4, 702.29 (iii B.C.); used in medicine, Hp. ll. cc.:—the fruit of one kind (ῥ. Συριακή Gal. 19.741; ῥ. ἐρυθρός Hp. Mul. 1.31, Gal. 12.353, cf. 922) was used as a spice:— of another, in tanning, ῥ. βυρσοδεψική Hp. Mul. 1.78; σκυτοδεψικός Ruf. ap. Orib. 8.24.3.
II. red ray, Lolium perenne, Dsc. 4.43.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project