| Tg | Glass transition temperature |
| API | Active pharmaceutical ingredients |
| Pe | Péclet number |
| MDIs | Metered-dose inhalers |
| DPI | Dry powder inhalers |
| COPD | Chronic obstructive pulmonary disease |
| FPF | Fine particle fraction |
| NGI | Next generation inhaler |
| MMDA | Median mass aerodynamic diameter |
| T°In | Inlet temperature |
| T°Out | Outlet temperature |
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