組成(そせい)

そせい
noun
composition; makeup; constituent elements
formalscience
1. composition; makeup; constituent elements
The components or elements that make up a substance, material, or system. Used in scientific, industrial, and analytical contexts to describe what something is made of and in what proportions.
岩石(がんせき)の組成(そせい)を調(しら)べる。
Examine the composition of rock.
この合金(ごうきん)の化学(かがく)組成(そせい)は複雑(ふくざつ)だ。
The chemical composition of this alloy is complex.
大気(たいき)の組成(そせい)は主(おも)に窒素(ちっそ)と酸素(さんそ)からなっている。
The composition of the atmosphere consists mainly of nitrogen and oxygen.

A compound of 組(そ) (assemble, put together) and 成(せい) (form, become). Primarily used in scientific and technical writing to describe the elemental or material makeup of something. Less commonly, it can also mean the act of organizing or forming a group, though 編成(へんせい) is more standard for that meaning.

Common collocations

Similar words

  • 成分(せいぶん): ingredient, component — focuses on individual elements rather than the overall makeup
  • 構成(こうせい): structure, constitution — broader term used for organizations, texts, and abstract systems as well as physical ones
  • 組織(そしき): organization, tissue — emphasizes the structural arrangement rather than the material content

Related Words

Compare: 成分(せいぶん) (ingredient, component)
Compare: 構成(こうせい) (structure, constitution)
Compare: 組織(そしき) (organization, tissue)
general
Added 2026.4.12 19:27 · Revised 2026.9.2 13:02
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