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ZAMO frame

(zero angular momentum frame)
(a frame of reference that is not rotating)

A ZAMO frame (for zero angular momentum frame) is a frame of reference that is not rotating, i.e., has no angular momentum. The term is commonly used in descriptions of general-relativity phenomena.

An inertial reference frame (that is not accelerating) is definitely a ZAMO frame. Dynamics described within any non-inertial frame needs to make accommodations regarding the acceleration. Fictitious forces can sometimes provide them.