| praxinoscope | <instrument, optics> An instrument, similar to the phenakistoscope, for presenting to view, or projecting upon a screen, images the natural motions of real objects. Origin: Gr. Action + -scope. Source: Websters Dictionary (01 Mar 1998) |
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| praxiology | The science or study of behaviour; it excludes the study of consciousness and similiar non-objective metaphysical concepts. Origin: G. Praxis, action, + logos, study (05 Mar 2000) |
| praxis | The performance of an action. Origin: G. Praxis, action (05 Mar 2000) |