simul·ta·ne·i·ty \ˌsīməltəˈnēəd.ē, ˌsim-, -ēətē, -i\noun (-es) Etymology: Medieval Latin simultaneitas, from (assumed) Medieval Latin simultaneus + Latin -itas -ity : the quality or state or an instance of being simultaneous < the simultaneity of these events has been exaggerated — G.G.Simpson > specifically: the presentation of different views of the same object (as a profile and full view of a face) in one work of art < simultaneity … in Egyptian painting — Helen Gardner >