appendage

詳細解釋：

ap.pend.age

n.（名詞）
Something added or attached to an entity of greater importance or size; an adjunct.
附屬物，附屬檔案，附加物：附加或附在更重要或更大實體上的東西；附加物
Biology A part or an organ, such as an arm, a leg, a tail, or a fin, that is joined to the axis or trunk of a body.
【生物學】 附器，附肢：與身體的軸或軀幹相連的部位或器官，如胳膊、腿、尾或鰭

<參考辭彙><同義詞>appendage,appurtenance,adjunct,accessory,attachmentThese nouns denote subordinate elements that are added to another entity. An
這些名詞均指加到另一實體上的從屬成份。
appendage supplements without being essential:
appendage 表示沒有必要增加的：
例句：
.Water jets can be angled to either side, making rudders unnecessary, and the complete absence of appendages at the stern decreases hull resistance. (R.J.L. Dicker). An
.水上噴氣式飛機可不用方向舵而轉向任何一個角度，同時因機尾完全沒有附加部分而減少了機身阻力. （R.J.L.迪克）。

appurtenance belongs naturally as a subsidiary attribute, part, or member to that with which it is associated:
appurtenance 則表示作為一附屬物自然地成為其相連對象的一部分或一成員：
例句：
.an internationally known first-class hotel . . . equipped with such appurtenances as computers, word processors, copiers and telex. (Oscar Millard). An
.一家舉世聞名一流飯店…裝備有計算機、文字處理機、複印機及傳真機等設施. （奧斯卡·密拉德）。

adjunct is added as an auxiliary to something else but is often self-sustaining:
adjunct 作為輔助物加到別的東西上，卻常能自成一體：
例句：
.Intelligence analysts say they believe that of all the countries of the Middle East, none use terrorism more effectively as an adjunct to diplomacy than Syria. (Elaine Sciolino). An
.情報分析家說，他們相信中東所有國家中，沒有哪一個比敘利亞更有效地把恐怖主義作為外交的輔助手段. （伊莉思·西奧利諾）。

accessory is usually nonessential but desirable and adds to the effect of something already complete in itself:
accessory 指通常不必要但卻使人渴望，並且附加到某種本身已非常完美的東西上來增加效果：
例句：
We bought a car with such accessories as air conditioning, stereo, and a sunroof. An
我們購買了一輛帶有空調、立體音響和汽車天窗的車。

attachment contributes a supplementary function to the principal thing, to which it can be physically linked:
attachment 對主要部分起補充作用，這種附加可以與主要部分自然地連線起來：
例句：
The food processor has an attachment for making pasta.
這種食品加工機具有製作義大利食品的附加裝置。