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- arrowhead scale
- Arrow-Hurwicz-Uzawa gradient method
- Arrow-impossibility theorem
- arrow keys
- Arrow paradox
- Arrow-Platt relative risk aversion
- Arrow-Pratt absolute risk aversion
- Arrow-Pratt coefficient
- arrowroot
- Arrow's impossibility theorem
- Arrows of God
- Arrow's paradox
- arrow tower
- arrow worm
- ARS
- ARSA
- ars antique
- ARSB
- arsenato antimonic acid
- arsenblende
- arsenblende; opiment
- arsenic
- arsenic acid
- arsenic compounds
- arsenic contamination of croplands