constituent

component, constituent, element, ingredient

这些名词均含“组成、成分、部分”之意。
component: 指一个整体的组成部分。
constituent: 常可与component换用，指某一整体不可少的部分或成分。
element: 指一个整体必不可少或固有的部分，强调一个复杂整体中最基本、最简单的元件、元素或成分等。
ingredient: 普通用词，含义笼统。既可指混在一起而本身没有变化的物质，如配料，又可指与别的物质混在一起，发生了变化的成分。

名词 constituent:

1. an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system
   同义词：component, element
2. a member of a constituency; a citizen who is represented in a government by officials for whom he or she votes
3. (grammar) a word or phrase or clause forming part of a larger grammatical construction
   同义词：grammatical constituent
4. an abstract part of something
   同义词：component, element, factor, ingredient

形容词 constituent:

1. constitutional in the structure of something (especially your physical makeup)
   同义词：constitutional, constitutive, organic

1. An essential or constituent element; a moment.
   必要的或构成的元素; 契机
2. Analyze the sentence into its constituent parts.
   把这条句子的各个成份加以分析。
3. Do you know the constituents of the mixture?
   你知道这种混合物的成份吗？

con.stit.u.ent

adj.（形容词）
Serving as part of a whole; component:
组成的：作为整体一部分的；组成的：
例句：
a constituent element.
一个构成因素

Empowered to elect or designate.
任命：被授权选举或任命的
Authorized to make or amend a constitution:
有权利制定或修改宪法的：
例句：
a constituent assembly.
立宪会议

n.（名词）
A constituent part; a component.See Synonyms at element
成分：一个构成部分；成分参见 element
A resident of a district or member of a group represented by an elected official.
选民：由一名被选出的官员作代表的选区居民或一组织的成员
One that authorizes another to act as a representative; a client.
委托人：授权他人代表其行事的人；委托人
Grammar One of two or more elements into which a construction or compound may be divided by analysis, being either immediate, asHe/ works on the railroad, or ultimate, as He/ work/s/ on/ the/ rail/road.
【语法】 成分：一个结构体或复合体通过分解可以分为两个或多个要素中的一个，可以是直接成分，如他／在铁路上工作， 或者也可以是最终的成分，如 他／在／铁路／上／工作

来源：
Latin cônstituôns cônstituent- [present participle of] cônstituere [to set up] * see constitute
拉丁语 cônstituôns cônstituent- [] cônstituere的现在分词 [建立] *参见 constitute
N., from French
名词，源自 法语
from Latin cônstituôns
源自 拉丁语 cônstituôns

【引伸】
constit.uently
adv.（副词）