- OB association
- OCO
- Life expectancy
- Electronegativity
- HIPS
- Venom
- Powder acceleration stage
- Ureter
- Blood cells
- Fog
- Hox gene
- Terrestrial time
- Electron neutrino
- Leakage current
- Plaster
- Submarine canyon
- CME
- Centripetal force
- Coal
- Deep Space 2
- IMAP
- Flight feathers
- Quantizing
- Homeogene
- Periphyton
- Radioactivity
- London Convention
- Xenomorph
- Water spouting statue
- New Moon