Absolute configuration

Chemical notation for the handedness of a chiral molecule or group

Absolute configuration

In chemistry, absolute configuration is the spatial arrangement of atoms within a molecular entity (or group) that is chiral, and its resultant stereochemical description. Absolute configuration is typically relevant in organic molecules where carbon is bonded to four different substituents. This type of construction creates two possible enantiomers.

From Wikipedia, under CC BY-SA. More on occurri.