parallelparts
nounUK /ˈpærəlɛl pɑːts/
US /ˈpærəlɛl pɑːrts/
Parts that are side by side and always the same distance apart.
The train tracks are parallelparts that never touch.
OTHER MEANINGS
2. Pieces of a machine that move together in the same direction.
The robot's arms have parallelparts that lift together.
3. Two things that are alike in many ways.
Their lives were parallelparts, both growing up near the sea.
4. Lines on a map that run side by side without crossing.
The map showed parallelparts marking the roads.