stereoisomers

n. one of two or more isomers whose molecular structures are identical but whose atomic arrangements differ (Chemistry)

Stereoisomers are isomeric molecules whose atomic connectivity is the same but whose atomic arrangement in space is different.
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n. stereoisomer, two or more isomers whose molecular structures are identical but atomic arrangements differ (Chemistry)

Two molecules that are nonsuperimposable mirror images of each other. One enantiomer rotates plane-polarized light to the left; the other rotates it to the right.

two different molecules made up of the exact same atoms, having exactly the same neighbors, and differing only in spatial orientation.