CELSS
| Acronym | Definition |
|---|---|
| CELSS | Controlled Ecological Life Support System (NASA) |
| CELSS | Controlled Ecological Life Support System (aka Closed Ecological Life Support Systems) |
| CELSS | Closed Ecological Life Support System (aka Controlled Ecological Life Support Systems) |
| CELSS | Closed Environmental Life Support System |
| CELSS | Controlled Ecology Life Support System |
| CELSS | Controlled Environment and Life Support System (NASA) |