|the ability of substances that are optical isomers to rotate the plane of polarization of a transmitted beam of plane-polarized light|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a scrap or morsel of food left at a meal.|
optical activity n.
The property of an asymmetrical molecule in solution to rotate the plane of polarized light either clockwise or counterclockwise.