Chicken
The D stands for dimensional.2 dimensional and 3 dimensional.
When you watch a 3D film/movie you must wear 3D glasses to get the 3D experience.
3 d stands for "in three dimensions". In other words the object under discussion has width, height and depth. In relation to film, 3 d films give you the IMPRESSION that there are three dimensions to...
a d a d d y is just a daddy aka a dad, father or papa