nī^grēdo — Lewis & Short
nī^grēdo, ĭnis, f.niger,
I blackness, black color (post-class.):
capilli corvinā nigredine,App. M. 2, p. 118, 31:
nigredo ollae,Vulg. Nah. 2, 10; Mart. Cap. 2, § 137:
atrae noctis,id. 1, § 67.