self-building unit
nounUK /ˌself ˈbɪldɪŋ ˈjuːnɪt/
US /ˌself ˈbɪldɪŋ ˈjuːnɪt/
A thing that puts itself together all by itself.
The toy robot is a self-building unit that snaps into shape when you press the button.
RELATED WORDS
OTHER MEANINGS
2. A building or structure that can be put up without outside help.
The shelter is a self-building unit that unfolds into a small house.
3. A part of a machine that grows or forms itself automatically.
Engineers tested a self-building unit that repairs its own broken pieces.
4. A piece of software that sets itself up on a computer.
The app is a self-building unit that installs everything it needs on its own.