The quality or condition of being pale; want of freshness or ruddiness; a sickly whiteness; lack of colour or luster; wanness. The blood the virgin's cheek forsook; A livid paleness spreads o'er all her look. (pope)
Results from our forum
... cells and plasma cells. Blood cells are assorted at lower levels where plasma settles on on top. This causes pallor mortis, in other words, that paleness from the lack of circulation in the body.
See entire post