- Supergiant star
- Cytochrome
- Autopoiesis
- Prevention
- Sea ice - First year thick
- Sex glands
- Magnetic disk
- Black poplar
- Inlandsis
- Cryogenic
- Phosphorescence
- Lava
- Mean motion
- Internal combustion hydrogen engine
- Geostationary orbit
- Transformation
- Random number
- Narcotic
- Fly
- Migration
- Half-duplex
- Stratiform
- Semelparity
- Pheromone
- Mean free path
- Goitre
- Batesian mimicry
- Embolisation
- Comet tail
- Deciduous