Present in a minor amount, and not essential.
Added or connected in a subordinate or auxiliary capacity:
Auxiliary; collateral; dependant; supplemental; subordinate.
That helps or aids; auxiliary
Find another word for appurtenant. In this page you can discover 5 synonyms, antonyms, idiomatic expressions, and related words for appurtenant, like: auxiliary, accessory, adjunct, ancillary and adjuvant.