Dictionary entry

χοῦς

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

χοῦς, -οός acc., οῦν, ὁ, (contr. from χόος),

[in LXX chiefly for עָפָר;]

1. earth, soil.

2. In later writers (Plut., LXX), = κονιορτός, dust: Mk 6:11, Re 18:19.†