Synonyms:
adjunct
Meaning: something added to another thing but not an essential part of it
Usage examples
He said, 'Walpole was a minister given by the King to the people: Pitt was a minister given by the people to the King,--as an adjunct.'
At the time this adjunct to the plant was required, the best dryer on the market was of a rotary type, which had a capacity of only twenty tons per hour, with the expenditure of considerable power.