| Laboratory utensils |
| Laboratory bottle |
| Dramatic opening? |
| Laboratory vessels |
| Aircraft opening? |
| Laboratory burners |
| Laboratory tube (Var.) |
| Cellular opening? |
| Chamber opening? |
| A recent opening? |
| A laboratory assistant |
| Adjusted opening? |
| Age opening? |
| High opening? |
| Slight opening? |
| Dextrous opening? |
| Bell opening? (and this puzzle's theme spelled out) |
| Lock opening? |
| Physical opening? |
| Dept. that oversees Los Alamos National Laboratory |
| Steven's opening? |
| Dome opening? |
| Milk-lover's letter opening? |
| Analyze in a laboratory |
| Store opening? |
| Oratory recesses |
| Checkers opening? |
| Asset in oratory |
| Jet Propulsion Laboratory site |
| Laboratory activities |