instantaneous axis

instantaneous axis

[¦in·stən¦tā·nē·əs ′ak·səs]
(mechanics)
The axis about which a rigid body is carrying out a pure rotation at a given instant in time.
References in periodicals archive ?
Lemaire explains that he developed the prosthesis, with the support Mourad Ben Mokhtar, head of Eden Spine's Research and Development entity, with 3 major goals in mind, "preserve the neutral zone over time, preserve the ratio of motion, and maintain the coherence between the instantaneous axis of rotation of the prosthesis and of the functional vertebral unit as defined by Dr.
The controlled mobility of the Mobi-C's mobile insert encourages restoration and respect of the instantaneous axis of rotation for a return to physiological mobility of the inter-vertebral disc and the cervical spine.

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