adjunct

Concise Oxford English Dictionary © 2008 Oxford University Press:
adjunct /ˈadʒʌŋ(k)t/

▶noun

• 1 an additional and supplementary part.

• 2 an assistant.

• 3 Grammar a word or phrase in a sentence other than the verb or predicate.

▶adjective connected or added in an auxiliary way.

– derivatives
adjunctive adjective.

– origin C16: from L. adjunct-, adjungere (see adjoin).