albēdo, ĭnis, f. [albus],
white color , whiteness; only in eccl. Lat.; Sev. Sulp. H. Sacr. 1, 16; Cassiod. Ep. 12, 4.
·noun Whiteness. Specifically: (Astron.) The ratio which the light reflected from an unpolished surf...
Webster's Dictionary of the English Language