γλύφανον
From LSJ
ἀσκέειν, περὶ τὰ νουσήματα, δύο, ὠφελέειν, 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
German (Pape)
τό, Schnitzmesser, Meißel, dat. H.h. Merc. 41; gen. Theocr. 1.28; accus. καλάμου Federmesser, Damochar. 2 (VI.63).