名詞 decimal:

1. a proper fraction whose denominator is a power of 10
   同義詞：decimal fraction
2. a number in the decimal system

形容詞 decimal:

1. numbered or proceeding by tens; based on ten
   同義詞：denary
2. divided by tens or hundreds

1. The first twofigures after the decimal point indicate tenths and hundredthsrespectively.
   小數(shù)點(diǎn)後的頭兩位數(shù)分別表示十分位和百分位。
2. Britain converted to a decimal currency system in 1971.
   英國於1971年改行十進(jìn)制貨幣體系。
3. The recurring decimal 3.999 ... is also described as 3.9 recurring.
   循環(huán)小數(shù)｀3.999 ... ＇亦作｀3.9循環(huán)＇.
4. A binary-coded decimal code for representing decimal numbers in which each decimal digit is represented by seven binary digits which are coefficients of8,6,4,2,0,1,0, respectively.
   用于表示十進(jìn)制數(shù)的一種二進(jìn)制編碼的十進(jìn)制碼，其中每位十進(jìn)制數(shù)用七位二進(jìn)制數(shù)來表示，它們分別是8,6, 4,2, 0,1和0的系數(shù)。五－二碼表如下：
5. Most countries have a decimal currency.
   大多數(shù)國家使用十進(jìn)制貨幣。
6. The base of a system of numbers, such as2 in the binary system and10 in the decimal system.
   基數(shù)數(shù)字系統(tǒng)的基數(shù)，如2是二進(jìn)制的基數(shù)，10是十進(jìn)制的基數(shù)

dec.i.mal

n.Mathematics （名詞）【數(shù)學(xué)】
A linear array of integers that represents a fraction, every decimal place indicating a multiple of a negative power of 0. For example, the decimal 0. = !/0, 0.2 = !"/00, 0.003 = #/000.Also called decimal fraction
小數(shù)：表示分?jǐn)?shù)的整數(shù)的線性排列，每一個小數(shù)點(diǎn)后的位置表示0的負(fù)次冪。例如，小數(shù)0.== !/0，0.2== !"/00，0.003== #/000也作 decimal fraction
A number written using the base 0.
十進(jìn)制的數(shù)：以0為底的數(shù)字
adj.（形容詞）
Expressed or expressible as a decimal.
小數(shù)的：用小數(shù)表示的或能用小數(shù)表示的

Based on 0.
以十為底的
Numbered or ordered by groups of 0.
十進(jìn)位的：以十個一組計數(shù)的或以十個一組排列的

來源：
Medieval Latin decim3lis [of tenths or tithes]
中世紀(jì)拉丁語 decim3lis [十分之一的]
from Latin decima [a tenth part or tithe]
源自 拉丁語 decima [第十部分]
from decem [ten] * see dekô
源自 decem [十] *參見 dekô

【引伸】
dec.imally
adv.（副詞）