| Answer | Crossword Clue |
|---|---|
| weepholes | WEEPHOLE, a hole in a wall through which water escapes |
| weephole | a hole in a wall through which water escapes |
| ultrafiltration | filtration through a medium (as a semipermeable capillary wall) which allows small molecules (as of water) to pass but holds back larger ones (as of protein) |
