ῥύπτειρα

A. f.l. for ἀρυτήρ in Dsc. 2.74), that cleanses from dirt, ῥ. κονίη soap, lye, v.l. for θρύπτειρα in Nic. Al. 370.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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