Earth or other matter in fine, dry particles. (Random House Unabridged Dictionary, 2d ed)
House Dust,Housedust,Dust, House
D012825
Silicon
A trace element that constitutes about 27.6% of the earth's crust in the form of SILICON DIOXIDE. It does not occur free in nature. Silicon has the atomic symbol Si, atomic number 14, and atomic weight [28.084; 28.086].