| Answer | Crossword Clue |
|---|---|
| photochromism | the property of changing color on exposure to light or other radiation and of reverting to original color immediately the light or radiation source is removed |
| Answer | Crossword Clue |
|---|---|
| photochromism | the property of changing color on exposure to light or other radiation and of reverting to original color immediately the light or radiation source is removed |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.