• (n.) A form of kaleidoscope.
Myr'i·o·scope noun [ Greek ... numberless + -scope .] A form of kaleidoscope. 
myrioscope A form of kaleidoscope. A kaleidoscope is an instrument invented by Sir David Brewster, which contains loose fragments of colored glass, etc, and reflecting surfaces so arranged that changes of position exhibit its contents in an endless variety of beautiful colors and symmetrical forms.