color-changing crayon
nounUK /ˈkʌlə ˈtʃeɪndʒɪŋ ˈkreɪɒn/
US /ˈkʌlər ˈtʃeɪndʒɪŋ ˈkreɪɑːn/
A crayon that changes to a different color when you use it.
She drew a blue sky with her color-changing crayon, and it turned purple in the sun.
RELATED WORDS
OTHER MEANINGS
2. A crayon whose color changes when exposed to heat from your hand.
The color-changing crayon turned from yellow to orange as he held it.
3. A crayon that changes color when wet.
Dip the color-changing crayon in water and watch the line turn green.
4. A novelty crayon used for fun art projects.
The party favors included a color-changing crayon for each kid.