Definitions for "Stereoisomers"
Keywords:  isomer, chiral, spatial, cis, molecular
Compounds with the same chemical formula that have different three-dimensional structures. See cis and trans isomers and chiral isomers.
Two compounds that have identical molecular formulas and atoms linked in the same order, but which have a different arrangement of atoms about an asymmetric carbon atom. D and L refer to particular configurations related to the configurations of D- and L-glyceraldehyde. All naturally occurring amino acids are L-isomers, and naturally occurring sugars generally are D-isomers.
two different molecules made up of the exact same atoms, having exactly the same neighbors, and differing only in spatial orientation.