ἄμμος
From LSJ
ἑὰν δὲ προσποιούμενος ᾗ τὰ μαθήματά πως ἀπείρως προβάλλων, οὐκ ἔστιν αἰτίας ἔξω → But should one profess knowledge as he puts forward something in an inexperienced way, he is not without blame (Pappus 3.1.30.31f.)
English (LSJ)
(A), or ἅμμος (cf. ὕφ-αμμος), ἡ,
A sand, Pl.Phd.110a, etc. II sandy ground, racecourse, X.Mem. 3.3.6. (Related to ἄμαθος as ψάμμος to ψάμαθος.)
ἄμμος (B), Aeol.
A = ἁμός (A), q. v.
German (Pape)
[Seite 126] ἡ, wie ψάμμος, Sand, obgleich Moeris letztere Form für attisch erklärt, Plat. Phaed. 110 a; Sandplatz zum Reiten, Xen. Mem. 3, 3, 6; Mörtel, Theophr.; Puzzolanerde, Strab. V, 245.