Final answer:
A meso compound is achiral and possesses an internal plane of symmetry, with meso-tartaric acid being a classic example.
Step-by-step explanation:
A meso compound is an achiral compound despite having two or more chiral centers. This characteristic arises from a meso compound's internal symmetry. Specifically, a meso compound harbors a plane of symmetry that bisects the compound such that the two halves are mirror images of each other. An exemplary meso compound is meso-tartaric acid, as opposed to its chiral counterparts (-)-tartaric acid and (+)-tartaric acid. Figure 3.3.10 from the resource provided illustrates how this plane of symmetry operates in meso-tartaric acid.