| MIO | minimum identifiable odor; modular input/output |
|---|---|
| MPO | maximum power output; minimal perceptible odor; myeloperoxidase |
| MRO | master reference oscillator; medical review officer; minimal recognizable odor; muscle receptor orga... |
| TLV | Threshold Limit Value |
| TLV-C | Threshold Limit Value-Ceiling = MAC(Maximum Allowable Concentration) ... |