prismtube
nounUK /ˈprɪzəmˌtjuːb/
US /ˈprɪzəmˌtuːb/
A clear tube shaped like a triangle that splits light into rainbow colors.
She looked through the prismtube and saw a rainbow on the wall.
RELATED WORDS
OTHER MEANINGS
2. A toy tube with mirrors inside that makes colorful patterns when you turn it.
He twisted the prismtube and watched the shapes change.
3. A small glass tube used in science to bend light for experiments.
The teacher placed the prismtube on the table for the light test.
4. A decorative lamp tube that glows in many colors.
The prismtube on the shelf glowed red and blue.