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radical

Overview

This page has 35 definitions of radical with English translations in 7 languages. Radical is an adjective and noun. Examples of how to use radical in a sentence are shown. Also define these 55 related words and terms: fundamental, botany, root, basic, intrinsic, ignorable, trivial, thoroughgoing, far-reaching, lexicography, phonology, phonetics, coronal, dorsal, labial, laryngeal, chemistry, free radical, mathematics, radix, awesome, arithmetic, linguistics, logographic, phonetic, Semitic, atom, covalent bond, reaction, unit, organic chemistry, algebra, ideal, commutative, ring, positive, integer, intersection, prime ideal, module, submodule, number theory, prime factor, radical, grammar, linguistic, morphology, raiz, extremista, drastic, extreme, excellent, thrilling, sports, and seismic.

English

Etymology

From French radical, from Late Latin rādīcālis (of or pertaining to the root, having roots, radical), from Latin rādix (root); see radix.

Pronunciation

Adjective

radical (comparative more radical, superlative most radical)

  1. Favoring fundamental change, or change at the root cause of a matter.
    His beliefs are radical.
    • Fundamental definition
      A leading or primary principle, rule, law, or article, which serves as the groundwork of a system; an essential part (1 of 3 fundamental definitions)
  2. (botany, not comparable) Pertaining to a root (of a plant).
    • Botany definition
      The scientific study of plants, a branch of biology. Typically those disciplines that involve the whole plant. (1 of 4 botany definitions)
  3. Pertaining to the basic or intrinsic nature of something.
    Synonym: fundamental
    Antonyms: ignorable, trivial
  4. Thoroughgoing; far-reaching.
    • 2012 January 1, Donald Worster, “A Drier and Hotter Future”, in American Scientist[1], volume 100, number 1, page 70:
      Phoenix and Lubbock are both caught in severe drought, and it is going to get much worse. We may see many such [dust] storms in the decades ahead, along with species extinctions, radical disturbance of ecosystems, and intensified social conflict over land and water. Welcome to the Anthropocene, the epoch when humans have become a major geological and climatic force.
    The spread of the cancer required radical surgery, and the entire organ was removed.
  5. (lexicography, not comparable) Of or pertaining to the root of a word.
  6. (phonology, phonetics, not comparable, of a sound) Produced using the root of the tongue.
    Coordinate terms: coronal, dorsal, labial, laryngeal
    • Phonetics definition
      The study of the physical sounds of human speech, concerned with the physical properties of speech sounds (phones), and the processes of their physiological production, auditory reception, and neurophysiological perception, and their representation by written symbols.
  7. (chemistry, not comparable) Involving free radicals.
    • Chemistry definition
      The branch of natural science that deals with the composition and constitution of substances and the changes that they undergo as a consequence of alterations in the constitution of their molecules. (1 of 3 chemistry definitions)
  8. (mathematics) Relating to a radix or mathematical root.
    a radical quantity; a radical sign
  9. (slang, 1980s & 1990s) Excellent; awesome.
    That was a radical jump!

Synonyms

  • (linguistics, in reference to words): primitive

Antonyms

Derived terms

 

Related terms

Translations

Noun

radical (plural radicals)

  1. (historical, 19th-century Britain) A member of the most progressive wing of the Liberal Party; someone favouring social reform (but generally stopping short of socialism).
  2. (historical, early 20th-century France) A member of an influential, centrist political party favouring moderate social reform, a republican constitution, and secular politics.
  3. A person with radical opinions.
  4. (arithmetic) A root (of a number or quantity).
  5. (linguistics) In logographic writing systems such as the Chinese writing system, the portion of a character (if any) that provides an indication of its meaning, as opposed to phonetic.
    • Linguistics definition
      The scientific study of language.
    • Logographic definition
      Of, related to, or composed of logographs.
  6. (linguistics) In Semitic languages, any one of the set of consonants (typically three) that make up a root.
  7. (chemistry) A group of atoms, joined by covalent bonds, that take part in reactions as a single unit.
    • Covalent Bond definition
      A type of chemical bond where two atoms are connected to each other by the sharing of two or more electrons.
  8. (organic chemistry) A free radical.
  9. (algebra, commutative algebra, ring theory, of an ideal) Given an ideal I in a commutative ring R, another ideal, denoted Rad(I) or I {\displaystyle {\sqrt {I}}} , such that an element xR is in Rad(I) if, for some positive integer n, xnI; equivalently, the intersection of all prime ideals containing I.
    • Algebra definition
      A system for computation using letters or other symbols to represent numbers, with rules for manipulating these symbols. (1 of 8 algebra definitions)
    • Integer definition
      English Wikipedia has an article on:
      Wikipedia
      A number that is not a fraction; an element of the infinite and numerable set {..., -3, -2, -1, 0, 1, 2, 3, ...}.
    • Prime Ideal definition
      Any (two-sided) ideal such that for arbitrary ideals and , or . (1 of 2 prime ideal definitions)
  10. (algebra, ring theory, of a ring) Given a ring R, an ideal containing elements of R that share a property considered, in some sense, "not good".
  11. (algebra, ring theory, of a module) The intersection of maximal submodules of a given module.
  12. (number theory) The product of the distinct prime factors of a given positive integer.

Derived terms

  • Artinian radical
  • Baer radical
  • Brown–McCoy radical
  • free radical
  • Jacobson radical
  • Köthe radical
  • Levitzki radical
  • lower radical
  • lower radical operator
  • radical class
  • radical ideal
  • radical sign
  • singular radical
  • strong radical
  • upper nil radical
 

Related terms

Translations

The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Dictionary:Entry layout § Translations.

References

Further reading

Anagrams


Catalan

Pronunciation

Adjective

radical (masculine and feminine plural radicals)

  1. radical

Derived terms

Noun

radical m or f (plural radicals)

  1. radical

Further reading


French

Etymology

Borrowed from Late Latin rādīcālis.

Pronunciation

Adjective

radical (feminine singular radicale, masculine plural radicaux, feminine plural radicales)

  1. radical
    L'idéologie islamiste radicale de Boko Haram a provoqué le déplacement de plus de deux millions de personnes dans le nord du Nigeria.
    The radical Islamist ideology of Boko Haram caused more than two million persons to be displaced in northern Nigeria.

Noun

radical m (plural radicaux)

  1. (linguistics, grammar) radical, root

Further reading


Galician

Pronunciation

Noun

radical m (plural radicais)

  1. radical (in various senses)

Derived terms

Further reading


Portuguese

Pronunciation

Noun

radical m (plural radicais)

  1. (linguistic morphology) root (primary lexical unit of a word)
    Synonym: raiz
    • Morphology definition
      A scientific study of form and structure, usually without regard to function. Especially:
      1. The study of the internal structure of morphemes (words and their semantic building blocks).
      2. The study of the form and structure of animals and plants.
      3. The study of the structure of rocks and landforms.
      4. Mathematical morphology.
      (1 of 7 morphology definitions)
    • Raiz definition
      alternative form of rayz

Noun

radical m, f (plural radicais)

  1. radical (person holding unorthodox views)
    Synonym: extremista
    • Extremista definition
      extremist

Adjective

radical m or f (plural radicais, comparable)

  1. radical (favouring fundamental change)
  2. drastic; extreme
    • Drastic definition
      Having a strong or far-reaching effect; extreme, severe. (1 of 2 drastic definitions)
  3. (Brazil, slang) excellent; awesome; thrilling
  4. (sports) extreme (dangerous)

Derived terms

Further reading

  • radical” in Dicionário Priberam da Língua Portuguesa.

Romanian

Adjective

radical m or n (feminine singular radicală, masculine plural radicali, feminine and neuter plural radicale)

  1. radical

Declension

Related terms


Spanish

Etymology

From Latin rādīcālis or Latin rādīx + Spanish suffix -al.

Pronunciation

  • IPA(key): /radiˈkal/, [ra.ð̞iˈkal]
  • Hyphenation: ra‧di‧cal

Adjective

radical (plural radicales)

  1. radical, seismic

Derived terms

Noun

radical m (plural radicales)

  1. radical

Derived terms

Further reading