a. pertaining to, like, deriving from or striking at root; fundamental; extreme; Mathematics, pertaining to radix; n. root; fundamental principle; advocate of radical, especially socialistic, policy; basic constituent of chemical compound; group of atoms replaceable by single atom. radical sign, Mathematics, sign indicating extraction of root.
Red and white are the traditional colours of South East Asia. The blue canton recalls the British Empire and represents unity. Yellow is the colour of the Sultans of Malaysia. Effective date: 16 September 1963.