- Periodontium
- Cinnabar
- Subfertility
- Top quark
- Pallas
- Enceladus
- Concrete
- Sputnik
- Spicules
- Vitiligo
- Precession constant
- Maxwell's demon
- Nuptial plumage
- Perseids
- Semantic web
- Pylorus
- MDLP
- Celestial meridian
- Bit
- Growth factor
- Constellation of Gemini
- Deep convection
- Spectacled bear
- Metamaterials
- Heliography
- Hermaphroditism
- Central processing unit
- Hoar frost
- Heliophile
- Hydroelectricity