1. (chemistry, physics) a property caused by asymmetrical molecular or crystal structure that enables a compound or crystal to rotate the plane of incident polarized light
   - optical activity

Encyclopedia: Optical rotation

• purple saxifrage
• purple silkweed
• purple strawberry guava
• purple trillium
• purple velvet plant
• purple virgin's bower
• purple willow
• purple-black
• purple-blue
• purple-brown
• purple-eyed
• schoolmistress
• schoolroom
• schoolteacher
• schooltime
• schoolwide
• schoolwork
• schoolyard
• schooner
• Schopenhauer
• schorl
• schottische
• Schreiber's aster
• schrod
• Schroedinger