cardinal

名词 cardinal:

1. (Roman Catholic Church) one of a group of more than 100 prominent bishops in the Sacred College who advise the Pope and elect new Popes
2. the number of elements in a mathematical set; denotes a quantity but not the order
   同义词：cardinal number
3. a variable color averaging a vivid red
   同义词：carmine
4. crested thick-billed North American finch having bright red plumage in the male
   同义词：cardinal grosbeak, Richmondena Cardinalis, Cardinalis cardinalis, redbird

形容词 cardinal:

1. serving as an essential component
   同义词：central, fundamental, key, primal
2. being or denoting a numerical quantity but not order

1. The cardinal number equal to2?0.
   二十等于2乘10的基数
2. The cardinal number equal to1015.
   十的十五次幂基数等于1015
3. The cardinal number equal to109.
   十亿基数，等于109
4. The cardinal idea of the Labor Party's political thought is that all people should be equal.
   工党政治思想的要点是人人平等。

car.di.nal

adj.（形容词）
Of foremost importance; paramount:
基本的：最重要的；首要的：
例句：
a cardinal rule; cardinal sins.
基本准则；七大罪

Color Dark to deep or vivid red.
【色彩】 大红的：颜色深至深红或鲜红的
n.（名词）
Abbr. Card.Roman Catholic Church A high church official, ranking just below the pope, who has been appointed by a pope to membership in the College of Cardinals.
缩写 Card.【罗马天主教】 红衣主教：一种高级宗教官员，级别仅低于教皇，由教皇任命为红衣主教团的成员
Color A dark to deep or vivid red.
【色彩】 大红：颜色深至深红或鲜红
A North American finch(Cardinalis cardinalis) having a crested head, a short, thick bill, and bright red plumage in the male.
主红雀：一种北美鸣鸟（主红雀 主红雀属） ，头部有羽冠，喙短而厚，雄鸟的羽毛色泽亮红
A short, hooded cloak, originally of scarlet cloth, worn by women in the 8th century.
女式斗篷：一种8世纪时，妇女披的带风帽的短斗篷，最初用猩红色的布料做成
A cardinal number.
基数

来源：
Middle English
中古英语
from Late Latin cardin3lis [principal, pivotal]
源自 后期拉丁语 cardin3lis [主要的，最重要的]
from Latin [serving as a hinge]
源自 拉丁语 [起铰链作用的]
from cardô cardin- [hinge]
源自 cardô cardin- [铰链]

【引伸】
car.dinalship.
n.（名词）