Ok, "stereo" sounds quite better
There is some confusion about this even for the vast majority of native English speakers.
At one time 3D meant stereo.
When software for computer-generated images (CGI) started to become available the term '3D' indicated that the entire scene consisted of objects composed of many points, each of which had an x,y,z co-ordinate.
In other words, you could have a virtual camera looking at the scene and because you know the co-ordinates of everything you can render the view as seen by the camera.
So, movies like 'Toy Story' can be produced.
Well, if you have a second virtual camera alongside the first you can render left and right views of the scene.
That is stereo 3D !
It is sometimes called S3D.