1. of, relating to, or proceeding from a root: such as
2. of or growing from the root of a plant
radical tubers
3. growing from the base of a stem, from a rootlike stem, or from a stem that does not rise above the ground
radical leaves
4. of, relating to, or constituting a linguistic root
5. of or relating to a mathematical root
6. designed to remove the root of a disease or all diseased and potentially diseased tissue
radical surgery radical mastectomy
7. of or relating to the origin fundamental
8. very different from the usual or traditional extreme
9. favoring extreme changes in existing views, habits, conditions, or institutions
10. associated with political views, practices, and policies of extreme change
11. advocating extreme measures to retain or restore a political state of affairs
the radical right
12. excellent, cool
13. a root part
14. a basic principle foundation
15. root sense 6
16. a sound or letter belonging to a radical
17. one who is radical
18. free radical also a group of atoms bonded together that is considered an entity in various kinds of reactions or as a subunit of a larger molecule
19. a mathematical expression indicating a root by means of a radical sign
20. radical sign
21. very new and different from what is traditional or ordinary
22. very basic and important
23. having extreme political or social views that are not shared by most people
24. a person who favors extreme changes in government a person who has radical political opinions
25. very new and different from the usual or ordinary extreme
a radical change
26. of or relating to people who favor rapid and sweeping changes in laws and government
27. a person who favors rapid and sweeping changes especially in laws and government
28. designed to remove the root of a disease or all diseased tissue
radical surgery
29. involving complete removal of an organ
radical prostatectomy — compare conservative
30. free radical also a group of atoms bonded together that is considered an entity in various kinds of reactions