radical

adj. having extreme political views; fundamental, pertaining to a root; advocating complete reform

n. person with extreme political views; root of a number (Mathematics)

Radical (from Latin radicis, genitive of radix "root") can refer to many different things and concepts.
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adj. radical, drastic

n. stem, radical, radix

adj. square root, number which is the total of a given number to the second power (i.e. the square root of 36 is 6 because 6 to the second power = 36); radical, pertaining to a root

n. radical, root of a number (Mathematics)

adj. radical; radicle

n. radical; radicle