| diff | a protozoan with an ovoid shell of cemented sand grains |
|---|---|
| diff | undergo diffraction |
| diff | when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands |
| diff | optical device consisting of a surface with many parallel grooves in it |
| diff | cause to become widely known |
| diff | spread or diffuse through |
| diff | move outward |
| diff | spread out |
| diff | lacking conciseness |
| diff | a cluster of stars within an intricate cloud of gas and dust |
| diff | (of light rays) subjected to scattering by reflection from a rough surface or transmission through a translucent material |
| diff | (of light) not bright or glaring |