running-in
nounfeminine/ʁuˈdaʒɐ̃j̃/medium
ro·da·gem
Definition
The action or process of operating a new vehicle or machine to allow parts to adjust to each other.
The car needs a proper running-in period before you can drive it at high speeds.
After the running-in, the engine's performance improved.
Common collocations
running-in periodrunning-in procedure
Etymology
De roda + -agem.