noun
also ad·jus·tor əˈjəstə(r)
( -s )
1. : one that sets up or inspects and tunes machines, fits and assembles parts of furniture or electrical equipment, or inspects and adjusts completed products (as typewriters)
2. : one that investigates claims for personal or property damage or complaints of unsatisfactory service, defective or damaged merchandise received, or improper billing and makes estimates for effecting settlement
3. : any of various devices for adjusting the position of a part or object especially with relationship to another part in a machine or apparatus (as one for attaching the rods of an oil-well pump to the walking beam and for adjusting the position of the rods)
4. usually adjustor : one of a set of muscles in some brachiopods that attach the peduncle to the shell and serve to raise the animal erect