Definition of "albedo" in Englisch

noun

1. (physics, meteorology, astronomy, optics) The fraction of incident light or radiation reflected by a surface or body, commonly expressed as a percentage.

2. (botany) The whitish inner portion of the rind of citrus fruits that is a source of pectin, commonly referred to as the pith.

3. (alchemy) One of the four major stages of the magnum opus, involving purification of the prima materia.