| Answer | Crossword Clue |
|---|---|
| ROTON | Energy quantum |
| roton | a quantum of vortex motion |
| Answer | Crossword Clue |
|---|---|
| ROTON | Energy quantum |
| roton | a quantum of vortex motion |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.