名詞 residual:

1. something left after other parts have been taken away
   同義詞：remainder, balance, residue, residuum, rest
2. (often plural) a payment that is made to a performer or writer or director of a television show or commercial that is paid for every repeat showing

形容詞 residual:

1. relating to or indicating a remainder
   同義詞：residuary

1. Residual deposits of soil, dust, and rock particles produced by the action of the wind.
   殘積層由于風力所產生的土壤、灰塵和巖石細粒的堆積物
2. The debate over the residual powers of the States has been long drawn out.
   有關美國剩余的權力的爭論已是曠日持久的了。

re.sid.u.al

adj.（形容詞）
Of, relating to, or characteristic of a residue.
殘留物的：屬于、關于或具殘留物特征的
Remaining as a residue.
剩余的：作為殘留物留下來的
n.（名詞）
The quantity left over at the end of a process; a remainder.
剩余額：在某一過程結束時遺留下來的數(shù)量；剩余部分
Often residuals A payment made to a performer, writer, or director for each repeat showing of a recorded television show or commercial.
常作 residuals 追加酬金：錄制的電視節(jié)目或商業(yè)廣告每次重映時向演員、作家或導演支付的酬金

【引伸】
resid.ually
adv.（副詞）