|Axis of Small Circle. That diameter of a sphere that passes perpendicularly through a small circle of the sphere. It is, therefore, axis of a great circle parallel to the small circle.
Axis of Symmetry. Straight line that divides a plane figure into two similar parts.
'Aye, Aye, Sir.' Customary acknowledgement of an order. Means that the order is understood and will be carried out.
Azimuth. Intercepted arc of horizon between observer's meridian and a vertical circle passing through an observed object.
Azimuthal Projection 29 Azores Anticyclone
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