名詞 diminution:

1. change toward something smaller or lower
   同義詞：decline
2. the statement of a theme in notes of lesser duration (usually half the length of the original)
3. the act of decreasing or reducing something
   同義詞：decrease, reduction, step-down

1. The capacity to absorb a drug continuously or in large doses without adverse effect; diminution in the response to a drug after prolonged use.
   耐藥量連續(xù)或大量吞服藥物后不發(fā)生任何副作用的能力; 長時(shí)間服藥后對(duì)藥品反應(yīng)的減弱
2. The government tried to prevent the diminution of resources.
   政府試圖阻止資源的減少。
3. They are hoping for a small diminution in taxes.
   他們希望稅捐略微減少。

dim.i.nu.tion

n.（名詞）

The act or process of diminishing; a lessening or reduction.
縮減：縮減的動(dòng)作或過程；減少或降低
The resulting reduction; decrease.
縮?。鹤罱K的降低；減少
Music Repetition of a theme in notes one-quarter or one-half the duration of the original.
【音樂】 減音：把音符緊縮為原始時(shí)值的四分之一或二分之一的重復(fù)主題的方法

來源：
Middle English diminucioun
中古英語 diminucioun
from Old French diminution
源自 古法語 diminution
from Latin dominôtiô dominôtiôn-
源自 拉丁語 dominôtiô dominôtiôn-
from dominôtus [past participle of] dominuere * see diminish
源自 dominôtus [] dominuere的過去分詞 *參見 diminish

【引伸】
dim.inu.tional
adj.（形容詞）