nebulosity

noun nebulosity

• gloom — total or partial darkness; dimness.
• vapor — a visible exhalation, as fog, mist, steam, smoke, or noxious gas, diffused through or suspended in the air: the vapors rising from the bogs.
• darkness — the state or quality of being dark: The room was in total darkness.
• fog — a second growth of grass, as after mowing.
• smoke — the visible vapor and gases given off by a burning or smoldering substance, especially the gray, brown, or blackish mixture of gases and suspended carbon particles resulting from the combustion of wood, peat, coal, or other organic matter.