/
ˈvəːtjʊəl/
adj.
    - almost or nearly as described, but not completely or according to strict definition.
- Computing  not physically existing as such but made by software to appear to do so.
- Optics  relating to the points at which rays would meet if produced backwards.
- Mechanics  relating to or denoting infinitesimal displacements of a point in a system.
Derivative
- virtuality
 /-jʊˈalɪti/
 n.
Etymology
ME (also in the sense ‘possessing certain virtues’): from med. L. virtualis, from L. virtus ‘virtue’.