tracing paper
nounUK /ˈtreɪsɪŋ ˌpeɪpə/
US /ˈtreɪsɪŋ ˌpeɪpər/
Thin see-through paper that you put over a picture so you can copy it.
She used tracing paper to copy the map from her book.
OTHER MEANINGS
2. Paper used by designers and artists to sketch and layer ideas.
The fashion designer sketched new dress ideas on tracing paper.
3. Paper used in sewing to copy patterns onto fabric.
She laid tracing paper over the pattern to mark the seams.
4. A thin translucent sheet used for technical or architectural drawings.
The architect rolled out tracing paper to revise the floor plan.