Main entry: basal, radical
Definition: 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
Usage: basal placentation; radical leaves
Antonyms: cauline
Definition: especially of leaves; growing on a stem especially on the upper part of a stem
Main entry: radical
Definition: arising from or going to the root or source
Usage: a radical flaw in the plan
Antonyms: incident, incidental
Definition: (sometimes followed by `to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence
Main entry: radical, revolutionary
Definition: markedly new or introducing radical change
Usage: a revolutionary discovery; radical political views
Antonyms: old
Definition: of long duration; not new
Antonyms: worn
Definition: affected by wear; damaged by long use
Main entry: extremist, ultra, radical
Definition: (used of opinions and actions) far beyond the norm
Usage: extremist political views; radical opinions on education; an ultra conservative
Antonyms: moderate
Definition: being within reasonable or average limits; not excessive or extreme