It has a constant angle to a fixed line, which is called its axis.
This is a device with a clamp that holds the blade at a constant angle to the stone.
The first nine aircraft were built with constant dihedral angle.
They are used to having the light source at a constant angle to their flight path.
This places the aircraft at a constant sideslip angle, which its natural stability will tend to correct.
The continuous motion makes it much easier to maintain a constant angle.
A more certain way to insure a constant angle is to use a blade holder made for this purpose.
It was this constant angle that the Sidewinder attempted to maintain.
The floor of the tunnel was still sloping downwards at a constant angle.
As with the chest fly, the hand and arm move through an arc while the elbow is kept at a constant angle.