- official verification
- offset voltage
- offload(ing)
- oil
- oily
- oily solution
- OMCL (Official Medicines Control Laboratory)
- on entering
- on the basis
- on-line sterile filtration
- one-room change area
- ongoing clinical trial
- ongoing process verification
- open
- open circuit operations
- open manipulation
- pack
- package size
- packaged
- packaged gases