Learn how to say Radicals correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word radical:
1(especially of change or action) relating to or affecting the fundamental nature of something; far-reaching or thorough:
a radical overhaul of the existing regulatory framework
forming an inherent or fundamental part of the nature of someone or something:
the assumption of radical differences between the mental attributes of literate and non-literate peoples
(of surgery or medical treatment) thorough and intended to be completely curative.
2characterized by departure from tradition; innovative or progressive:
the city is known for its radical approach to transport policy
advocating or based on thorough or complete political or social reform; representing or supporting an extreme or progressive section of a political party:
a radical American activist
British historical belonging to an extreme section of the Liberal party during the 19th century.
3relating to the root of something, in particular:
Mathematics of the root of a number or quantity.
denoting or relating to the roots of a word.
Music belonging to the root of a chord.
Botany of, or springing direct from, the root or stem base of a plant.
4 [usually as exclamation] North American informal very good; excellent:
Okay, then. Seven o’clock. Radical!
1a person who advocates thorough or complete political or social reform; a member of a political party or part of a party pursuing such aims.
2 Chemistry a group of atoms behaving as a unit in a number of compounds. See also free radical.
3the root or base form of a word.
any of the basic set of approximately 214 Chinese characters constituting semantically or functionally significant elements in the composition of other characters and used as a means of classifying characters in dictionaries.
4 Mathematics a quantity forming or expressed as the root of another.
a radical sign.