Achirality - an object or molecule that is superimposable on its mirror image. The classic description of achirality is the comparison of the glass of water in a mirror, because the mirror image is identical. An achiral molecule has no chiral centers.
Up to date info
Latest research - Achirality
Source: Data courtesy of the U.S. National Library of Medicine. Since the data might have changed, please query MeSH on Achirality for any updates.