ῥοάς
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
άδος, ἡ, (ῥέω)
A shedding of fruit, a disease of vines, f.l. for ῥυάς, Thphr.HP4.14.6.