anti-freezing - atomic formulae
- astronomic meridian
- astronomic method
- astronomic monument
- astronomic point
- astronomic theodolite
- astronomic transit
- astronomic traverse
- astronomical azimuth
- astronomical chart
- astronomical electronics
- astronomical equator
- astronomical guidance
- astronomical latitude
- astronomical lens
- astronomical levelling
- astronomical longitude
- astronomical meridian
- astronomical method
- astronomical monument
- astronomical point
- astronomical refraction
- astronomical telescope
- astronomical time
- astronomical transit
- astronomical traverse
- astronomical triangle
- astronomo-geodetic
- astronomo-geodetic observations
- astylar
- asymmetric compound
- asymmetrical network
- asymptotic cone
- asymptotic flux
- asynchronous discharger
- asynchronous motor
- at full throttle
- at rest
- atacamite
- athrust management system
- athwart
