Strong’s Greek
G5522 — choos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
χοῦς
choos — pronounced kho'-os
from the base of 5494; a heap (as poured out), i.e. rubbish; loose dirt:--dust. see GREEK for 5494
2 occurrences in the KJV.
Mark 6:11
And whosoever shall not receive you, nor hear you, when ye depart thence, shake off the dust under your feet for a testimony against them. Verily I say unto you, It shall be more tolerable for Sodom and Gomorrha in the day of judgment, than for that city.
Revelation 18:19
And they cast dust on their heads, and cried, weeping and wailing, saying, Alas, alas that great city, wherein were made rich all that had ships in the sea by reason of her costliness! for in one hour is she made desolate.