σκῖρον

τό
A. rind of cheese, Eup. 277, Ar. V. 925 (also = λατύπη, used as cement, acc. to Sch.Ar. l.c. (921)).
2. ingrained dirt, Cratin. 444.
II. scar, glossed by σκίρρον, Tz. H. 5.702.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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