spectrumdisk
nounUK /ˈspɛktrəm dɪsk/
US /ˈspɛktrəm dɪsk/
A spectrumdisk is a round thing that shows all the colors of light spread out like a rainbow.
The scientist looked through the spectrumdisk and saw red, orange, yellow, green, and blue.
OTHER MEANINGS
2. A disk-shaped tool used to split light into its different colors.
She held the spectrumdisk up to the sun to make a rainbow on the wall.
3. A round chart that organizes colors in order by their wavelengths.
The class used a spectrumdisk to learn the order of colors in light.
4. A spinning disk painted with colors that blend into white when it turns fast.
When the spectrumdisk spun quickly, all the colors mixed and looked white.