| 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) |