complexとは

意味・読み方・使い方

発音

• 韻: -ɛks

Adjective

• (英国発音) IPA^(key): /kəmˈplɛks/, /ˈkɒm.plɛks/
• (米国発音) enPR: kəmplĕks, kŏm'plĕks; IPA^(key): /kəmˈplɛks/, /ˈkɑmplɛks/

Noun

• (英国発音) IPA^(key): /ˈkɒm.plɛks/
• (米国発音) enPR: kŏm'plĕks, IPA^(key): /ˈkɑmplɛks/

形容詞

complex (comparative complexer または more complex, superlative complexest または most complex)

1. Made up of multiple parts; composite; not simple.

   a complex being; a complex idea

   • 1689 (indicated as 1690), [John Locke], chapter 2, in An Essay Concerning Humane Understanding. […], London: […] Eliz[abeth] Holt, for Thomas Basset, […], OCLC 153628242, book I, page 12:

     Ideas thus made up of several simple ones put together, I call complex; such as beauty, gratitude, a man, an army, the universe.

2. Not simple, easy, or straightforward; complicated.
   • 1837, William Whewell, History of the Inductive Sciences

     When the actual motions of the heavens are calculated in the best possible way, the process is complex and difficult.

3. (mathematics, of a number) Having the form a + bi, where a and b are real numbers and i is (by definition) the imaginary square root of −1.

   complex number

   function of a complex variable

4. (mathematics, mathematical analysis, of a function) Whose range is a subset of the complex numbers.

   complex function

5. (mathematics, algebra) Whose coefficients are complex numbers; defined over the field of complex numbers.

   complex polynomial

   complex algebraic variety

6. (geometry) A curve, polygon or other figure that crosses or intersects itself.

同意語

• (not simple): complicated, detailed, difficult, hard, intricate, involved, tough

反意語

• (not simple): basic, easy, simple, simplex, straightforward

派生語

• complex function
• complexify
• complexity
• complexness
• pseudocomplex

関連する語

• complexion
• (数学): symplectic

名詞

complex (複数形 complexes)

1. A problem. (clarification of this definition is needed)
2. A network of interconnected systems.

   military-industrial complex

3. A collection of buildings with a common purpose, such as a university or military base.
   • 2021 February 6, The Courier-Mail, page 4, column 1:

     A man at the complex said he had seen the often heavily made-up girls coming and going in luxury vehicles.

4. An assemblage of related things; a collection.
   • 1698, Robert South, Twelve Sermons upon Several Subjects and Occasions

     This parable of the wedding supper comprehends in it the whole complex of all the blessings and privileges exhibited by the gospel.

   1. An organized cluster of thunderstorms.
   2. A cluster of wildfires burning in the same vicinity.

      The fire complex began as two separate fires.

      • 2020 September 16, “Millions of acres burn in California as weather improves in Northwest.”, in The New York Times, retrieved September 16, 2020:

        As of early Wednesday, there were at least 25 major wildfires and fire complexes, the term given to multiple fires in a single geographic area, burning in California, Christine McMorrow, a Cal Fire information officer, said.

   3. (taxonomy) A group of closely related species, often distinguished only with difficulty by traditional morphological methods.
      • 2015 November 26, Mosè Manni et al., “Relevant genetic differentiation among Brazilian populations of Anastrepha fraterculus (Diptera, Tephritidae)”, in ZooKeys, volume 540, DOI:10.3897/zookeys.540.6713:

        Since then, a good deal of research has documented and concluded that the nominal species A. fraterculus actually comprises an unresolved complex of cryptic species.

5. (psychoanalysis) An abnormal mental condition caused by repressed emotions.
6. (informal, by extension) A vehement, often excessive psychological dislike or fear of a particular thing.

   Jim has a real complex about working for a woman boss.

7. (chemistry) A structure consisting of a central atom or molecule weakly connected to surrounding atoms or molecules.
   • 2013 September-October, Katie L. Burke, “In the News”, in American Scientist:

     Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: […] . The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light. The critical component of the photosynthetic system is the “water-oxidizing complex”, made up of manganese atoms and a calcium atom.

8. (mathematics) A complex number.
   • 1996, Barry Simon, Representations of Finite and Compact Groups, page 50:

     The interesting aspect here is that U₃ is irreducible, even though all irreps over the complexes are one-dimensional because ℤ₄ is abelian.

派生語

動詞

complex (三人称単数 現在形 complexes, 現在分詞 complexing, 過去形および過去分詞形 complexed)

1. (chemistry, intransitive) To form a complex with another substance
2. (transitive) To complicate.

Further reading

• complex in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
• complex in The Century Dictionary, The Century Co., New York, 1911.
• complex at OneLook Dictionary Search