Only in this chapter. The kindred noun χοῦς dust appears Mar 6:11; Rev 18:19. From χέω to pour; hence of earth thrown down or heaped up: loose earth. Compare Gen 2:7, Sept., where the word is used.
From heaven (ἐζ οὐρανοῦ)
Ἑξ out of, marking the origin, as ἐκ γῆς out of the earth. Meyer acutely remarks that “no predicate in this second clause corresponds to the earthy of the first half of the verse, because the material of the glorified body of Christ transcends alike conception and expression.” The phrase includes both the divine origin and the heavenly nature; and its reference, determined by the line of the whole argument, is to the glorified body of Christ - the Lord who shall descend from heaven in His glorified body. See Phi 3:20, Phi 3:21.