appurtenance

n. 附属物, 附件
【化】 附属设备
【经】 从属物, 附属物

形容词:appurtenant 

ap.pur.te.nance

n.（名词）
Something added to another, more important thing; an appendage.See Synonyms at appendage
附属品：加于另外的更重要的事物上的事物；附加物参见 appendage
appurtenances Equipment, such as clothing, tools, or instruments, used for a specific purpose or task; gear.
appurtenances 特殊附件：用于特殊目的的设备，如衣物、工具或仪器；装备
Law A right, privilege, or property that is considered incident to the principal property for purposes such as passage of title, conveyance, or inheritance.
【法律】 附带权力：为如认可头衔通过，财产让与或继承的目的而被认为附带于主要财产的权力、特权或财富

来源：
Middle English appurtenaunce
中古英语 appurtenaunce
from Anglo-Norman apurtenance
源自 英法语 apurtenance
from Vulgar Latin *appertinentia
源自 俗拉丁语 *appertinentia
from Late Latin appertinôns appertinent- [present participle of] appertinôre [to appertain] * see appertain
源自 后期拉丁语 appertinôns appertinent- [] appertinôre的现在分词 [专属] *参见 appertain

【引伸】
appur.tenant
adj.（形容词）