| Answer | Crossword Clue |
|---|---|
| ultrafilters | ULTRAFILTER, to pass through an ultrafilter |
| Answer | Crossword Clue |
|---|---|
| ultrafilters | ULTRAFILTER, to pass through an ultrafilter |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.