radical
ra
ˈræ
di
di
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kəl
kēl
radial

Definition & Meaning of "radical"in English

radical
01

supporting total and extreme social or political changes 

radical definition and meaning
Examples
The radical activist advocated for the overthrow of the government to establish a new social order. 
02

(of actions, ideas, etc.) very new and different from the norm 

Grammatical Information
Composition
Simple
qualitative
Superlative
most radical
Comparative
more radical
gradable
Examples
The scientist proposed a radical theory that challenged established beliefs. 
03

originating from or relating to the root or source of something 

Examples
The scientist studied the radical causes of the disease. 
04

(of leaves) growing at or arising from the base of a plant or directly from the root or rootstock 

Examples
The plant has several radical leaves sprouting at its base. 
05

of or relating to a root in language, such as the root of a word 

Examples
The radical of the verb conveys its essential meaning. 
Radical
01

a group of atoms bonded together that behaves as a single unit within a molecule 

Grammatical Information
Animacy status
Abstract
Composition
Simple
Countable
Plural form
radicals
Examples
The hydroxyl radical is highly reactive and plays a key role in many chemical reactions. 
02

an atom or group of atoms with at least one unpaired electron, often highly reactive 

Examples
Free radicals can damage cells if not neutralized. 
03

a person who holds extreme or unconventional ideas or opinions 

Examples
The radical spoke passionately at the town hall. 
04

a character or component conveying the lexical meaning of a logogram 

Examples
The radical in the character indicates its semantic category. 
05

the form of a word after all affixes are removed 

Examples
The radical of "unhappiness" is "happy." 
06

a quantity expressed as the root of another quantity 

Examples
The radical √16 equals 4. 
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