| Answer | Crossword Clue |
|---|---|
| REM | "Perfect Square" rock group |
| NINE | A perfect square |
| sabins | a unit of acoustic absorption equivalent to the absorption by one square foot of a perfect absorber |
| halites | soft white or colorless mineral, sodium chloride, NaCl, occurring in cubic crystals with perfect cleavage; rock salt |
| halite | soft white or colorless mineral, sodium chloride, NaCl, occurring in cubic crystals with perfect cleavage; rock salt |
