What does Radical mean?

Definitions for Radical
ˈræd ɪ kəlRad·i·cal

Here are all the possible meanings and translations of the word Radical.

Princeton's WordNet

  1. group, radical, chemical groupnoun

    (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

  2. free radical, radicalnoun

    an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule

    "in the body free radicals are high-energy particles that ricochet wildly and damage cells"

  3. radicalnoun

    a person who has radical ideas or opinions

  4. radicalnoun

    (mathematics) a quantity expressed as the root of another quantity

  5. radicalnoun

    a character conveying the lexical meaning of a logogram

  6. root, root word, base, stem, theme, radicaladjective

    (linguistics) the form of a word after all affixes are removed

    "thematic vowels are part of the stem"

  7. extremist, radical, ultraadjective

    (used of opinions and actions) far beyond the norm

    "extremist political views"; "radical opinions on education"; "an ultra conservative"

  8. revolutionary, radicaladjective

    markedly new or introducing radical change

    "a revolutionary discovery"; "radical political views"

  9. radicaladjective

    arising from or going to the root or source

    "a radical flaw in the plan"

  10. radicaladjective

    of or relating to or constituting a linguistic root

    "a radical verb form"

  11. radical, basaladjective

    especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem

    "basal placentation"; "radical leaves"

Wiktionary

  1. radicalnoun

    A member of the most progressive wing of the Liberal Party; someone favouring social reform (but generally stopping short of socialism).

    Etymology: From radical, from radicalis, from radix; see radix.

  2. radicalnoun

    A member of an influential, centrist political party favouring moderate social reform, a republican constitution, and secular politics.

    Etymology: From radical, from radicalis, from radix; see radix.

  3. radicalnoun

    A person with radical opinions.

    Etymology: From radical, from radicalis, from radix; see radix.

  4. radicalnoun

    A root (of a number or quantity).

    Etymology: From radical, from radicalis, from radix; see radix.

  5. radicalnoun

    In logographic writing systems as the Chinese writing system, the portion of a character (if any) that provides an indication of its meaning, as opposed to phonetic.

    Etymology: From radical, from radicalis, from radix; see radix.

  6. radicalnoun

    In Semitic languages, any one of the set of consonants (typically three) that make up a root.

    Etymology: From radical, from radicalis, from radix; see radix.

  7. radicalnoun

    A group of atoms, joined by covalent bonds, that take part in reactions as a single unit.

    Etymology: From radical, from radicalis, from radix; see radix.

  8. radicalnoun

    A free radical.

    Etymology: From radical, from radicalis, from radix; see radix.

  9. radicaladjective

    Favouring fundamental change, or change at the root cause of a matter.

    His beliefs are radical.

    Etymology: From radical, from radicalis, from radix; see radix.

  10. radicaladjective

    Of or pertaining to a root .

    Etymology: From radical, from radicalis, from radix; see radix.

  11. radicaladjective

    Of or pertaining to the intrinsic nature of something.

    Etymology: From radical, from radicalis, from radix; see radix.

  12. radicaladjective

    Thoroughgoing.

    The spread of the cancer required radical surgery, and the entire organ was removed.

    Etymology: From radical, from radicalis, from radix; see radix.

  13. radicaladjective

    Of or pertaining to the root of a word.

    Etymology: From radical, from radicalis, from radix; see radix.

  14. radicaladjective

    Involving free radicals

    Etymology: From radical, from radicalis, from radix; see radix.

  15. radicaladjective

    Excellent.

    That was a radical jump!

    Etymology: From radical, from radicalis, from radix; see radix.

Webster Dictionary

  1. Radicaladjective

    of or pertaining to the root; proceeding directly from the root

  2. Radicaladjective

    hence: Of or pertaining to the root or origin; reaching to the center, to the foundation, to the ultimate sources, to the principles, or the like; original; fundamental; thorough-going; unsparing; extreme; as, radical evils; radical reform; a radical party

  3. Radicaladjective

    belonging to, or proceeding from, the root of a plant; as, radical tubers or hairs

  4. Radicaladjective

    proceeding from a rootlike stem, or one which does not rise above the ground; as, the radical leaves of the dandelion and the sidesaddle flower

  5. Radicaladjective

    relating, or belonging, to the root, or ultimate source of derivation; as, a radical verbal form

  6. Radicaladjective

    of or pertaining to a radix or root; as, a radical quantity; a radical sign. See below

  7. Radicalnoun

    a primitive word; a radix, root, or simple, underived, uncompounded word; an etymon

  8. Radicalnoun

    a primitive letter; a letter that belongs to the radix

  9. Radicalnoun

    one who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; -- opposed to conservative

  10. Radicalnoun

    a characteristic, essential, and fundamental constituent of any compound; hence, sometimes, an atom

  11. Radicalnoun

    specifically, a group of two or more atoms, not completely saturated, which are so linked that their union implies certain properties, and are conveniently regarded as playing the part of a single atom; a residue; -- called also a compound radical. Cf. Residue

  12. Radicalnoun

    a radical quantity. See under Radical, a

  13. Radicaladjective

    a radical vessel. See under Radical, a

Freebase

  1. Radical

    In chemistry, a radical is an atom, molecule, or ion that has unpaired valence electrons or an open electron shell, and therefore may be seen as having one or more "dangling" covalent bonds. With some exceptions, these "dangling" bonds make free radicals highly chemically reactive towards other substances, or even towards themselves: their molecules will often spontaneously dimerize or polymerize if they come in contact with each other. Most radicals are reasonably stable only at very low concentrations in inert media or in vacuum. A notable example of free radical is the hydroxyl radical, a molecule that is one hydrogen atom short of a water molecule and thus has one bond "dangling" from the oxygen. Two other examples are the carbene molecule, which has two dangling bonds; and the superoxide anion, the oxygen molecule O2 with one extra electron, which has one dangling bond. On the other hand, the hydroxyl anion, the oxide anion and the carbenium cation are not radicals, since the bonds that may appear to be dangling are in fact resolved by the addition or removal of electrons. Free radicals may be created in a number of ways, including synthesis with very dilute or rarefied reagents, reactions at very low temperatures, or breakup of larger molecules. The latter can be affected by any process that puts enough energy into the parent molecule, such as ionizing radiation, heat, electrical discharges, electrolysis, and chemical reactions. Indeed, radicals are intermediate stages in many chemical reactions.

Chambers 20th Century Dictionary

  1. Radical

    rad′i-kal, adj. pertaining to the root or origin: original: fundamental: intrinsic: primitive: implanted by nature: not derived: serving to originate: (bot.) proceeding immediately from the root: (politics) ultra-liberal, democratic.—n. a root: a primitive word or letter: one who advocates radical reform, an uncompromising democratic politician: (chem.) the base of a compound.—v.t. Rad′icalise, to make radical.—v.i. to become radical, adopt radical political principles.—n. Rad′icalism, the principles or spirit of a radical or democrat.—adv. Rad′ically.—n. Rad′icalness. [Radix.]

British National Corpus

  1. Spoken Corpus Frequency

    Rank popularity for the word 'Radical' in Spoken Corpus Frequency: #2725

  2. Adjectives Frequency

    Rank popularity for the word 'Radical' in Adjectives Frequency: #369

How to pronounce Radical?

How to say Radical in sign language?

Numerology

  1. Chaldean Numerology

    The numerical value of Radical in Chaldean Numerology is: 6

  2. Pythagorean Numerology

    The numerical value of Radical in Pythagorean Numerology is: 3

Examples of Radical in a Sentence

  1. Alvin Bamberger:

    I'm not surprised we have a biased system that favors violent and radical leftists instead of holding up justice for everyone.

  2. Ayatollah Ali Khamenei:

    This is blatant foolishness and insanity. When he still could address the Bahraini people, Sheikh Isa Qassim... would advise against radical and armed actions, attacking Sheikh Isa Qassim means removing all obstacles blocking heroic Bahraini youths from attacking the regime.

  3. Justin Logan:

    If the goal were to stay until radical Islamist resistance in Afghanistan was defeated, we would be there forever.

  4. Freshman Lee Zeldin:

    I strongly believe we were reminded in Paris that these radical Islamic extremists, they want to wipe Israel off the map, they target not only Jews but our freedom our exceptionalism as Americans -- the whole western world.

  5. Ewald Nowotny:

    It's especially dangerous to say that we have to have radical change otherwise everything will die, we know we will not have radical change in the near future... So the logic would be that Europe would have to collapse.

Images & Illustrations of Radical

  1. RadicalRadicalRadicalRadicalRadical

Popularity rank by frequency of use

Radical#1#6963#10000

Translations for Radical

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