Superimposition (noun)

The action or process of placing one thing over or on top of another, especially in order to combine or compare the two.

Origin:

Late 19th century, from french superimposer, from super- + imposer 'to impose'.

Examples:

1. The geologists used superimposition to determine the age of the rock layers.
2. The artist created an optical illusion through superimposition of shapes and colors.
3. The X-rays revealed the superimposition of the broken bones in his arm.
4. The graphic designer utilized superimposition to combine different images into a single design.
5. The scientist employed superimposition to compare the patterns in the two sets of data.