n. pl. al·be·dos
1. The fraction of incident electromagnetic radiation reflected by a surface, especially of a celestial body.
2. The spongy white tissue on the inside of the rind of citrus fruit.
[Late Latin albēdō, whiteness, from Latin albus, white; see albho- in the Appendix of Indo-European roots.]
(click for a larger image)albedo
of a pomelo
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.