astr - back
- at right angles to
- at sight
- at the bottom
- at the centre
- at the edges
- at the expense of
- at the font
- at the high frequency side
- at the low frequency side
- at the receiver end
- at the receiving end
- at the same time
- Athena project
- Atherton technology
- Atherton technology tool integration system: ATIS
- atmosphere
- atmospheres above atmospheric pressure
- atmospheres effective pressure
- atmospheres excess pressure
- atmospheric conditions
- atmospheric duct
- atmospheric gauge pressure
- atmospheric noise
- atmospheric overpressure
- atmospheric statics
- atom
- atom band structure
- atomic
- atomic age
- atomic centre
- atomic charge
- atomic defect absorption
- atomic energy
- atomic laser
- atomic number
- atomic ordering
- atomic power
- atomic spacing
- atomic structure
- atomic theory
