doubleform
nounUK /ˈdʌbəlˌfɔːm/
US /ˈdʌbəlˌfɔːrm/
A doubleform is something that has two shapes or two parts joined together.
The toy robot has a doubleform that lets it turn into a car.
OTHER MEANINGS
2. A document or paper made in two identical copies.
Please sign the doubleform and keep one copy for yourself.
3. A word or phrase that can be written in two different ways.
The teacher explained that 'color' and 'colour' are a doubleform.
4. A design or pattern that repeats twice side by side.
The wallpaper had a pretty doubleform of flowers.