Azeotrope

Having constant maximum and minimum boiling points.

Azeotropic mixture

Example of azeotropic mixture refrigerant R-502 is mixture consisting of 48.8% refrigerant R-22 and 51.2% R-115. The refrigerants do not combine chemically, yet azeotropic mixture provides refrigeration characteristics desired

Azimuth

1. The angle between the vertical plane containing a line or celestial body and the plane of the meridian, conventionally measured from north through east in astronomical computations, and from south through west in triangulation and precise traverse work.
   Also see

   • azimuth angle
2. The angle, normally 90°, between the direction of motion of the film or tape and the slit or gap in the optical or magnetic head.
   Also see

   • bearing

Azimuthal power instability

Abnormal neutron behavior which results in uneven nuclear conditions in the reactor

Azimuth angle

Horizontal angle of observed line with reference to true north.

Aztek

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Pontiac Aztek

A model of SUV manufactured by the Pontiac division of General Motors from 2001-07.

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