Autodesk 3ds Max/Terminology
Active Viewport - The viewport in which you are currently working. In the default settings, the active viewport will always be outlined in yellow.
Object - a 3-Dimensional object in your scene.
Primitive - a basic object that can be created from the Create Geometry panel in the Command Panel on the right side of the screen.
Shape - a 2-Dimensional object in your scene.
Transform - the changing in size, position, or rotation of an object or shape.
Gizmo - A visual aid that helps the user understand the transformations being applied to an object.
Polygon - A flat "plane" made up of three or more points.
Triangulation - The process of converting polygons with more than three points into groups of triangles for rendering purposes.