- Condensation boiler
- Sex glands
- Flood
- Radian
- Aphonia
- SIM card
- Supplementary service
- Constellation of Andromeda
- Leukaemia
- Parasol
- Celestial meridian
- Solar eclipse of 11 August 1999
- M95
- Frost
- Swallow-hole
- Barchan
- Equinox equation
- Biomimetics
- Neutrino
- Bubonic plague
- Dew
- Planetary aberration
- Natural disaster
- Minute of arc
- Invertebrate
- Azimuth of a direction
- Benthic
- Oolitic
- Dome
- Coanda effect