| optical rotation | |
| —n | |
| the angle through which plane-polarized light is rotated in its passage through a substance exhibiting optical activity | |
| a gadget; dingus; thingumbob. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
optical rotation n.
The change or rotation in the plane of polarization that occurs when polarized light is passed through an optically active substance.