ἄμμος,
or ἅμμος (compare ὕφ-αμμος), ἡ,
__A sand, [[ 5th-6th c.BC: Plato Philosophus “Phaedo” 110a, etc. ] Refs 5th c.BC+]
__A.II sandy ground, racecourse, [[ 5th-6th c.BC: Xenophon Historicus “Memorabilia” 3.3.6. (Related to ἄμαθος as ψάμμος to ψάμαθος.) ] Refs 5th c.BC+]