greendecal
nounUK /ˌɡriːnˈdiːkæl/
US /ˌɡriːnˈdiːkæl/
A green sticker or picture that you can peel off and stick somewhere.
She put a greendecal of a leaf on her notebook.
OTHER MEANINGS
2. A small green mark or stain left on a surface.
There was a greendecal on the window after the rain.
3. A green design printed on a car or machine.
The race car had a greendecal on its door.
4. A green patch that grows on rocks or walls.
Moss made a greendecal on the old stone wall.