How to pronounce radical in English

"Of or pertaining to the root; proceeding directly from the root."

"Hence: Of or pertaining to the root or origin; reaching to the center to the foundation to the ultimate sources to the principles or the like; original; fundamental; thorough-going; unsparing; extreme; as radical evils; radical reform; a radical party."

"Belonging to or proceeding from the root of a plant; as radical tubers or hairs."

"Proceeding from a rootlike stem or one which does not rise above the ground; as the radical leaves of the dandelion and the sidesaddle flower."

"Relating or belonging to the root or ultimate source of derivation; as a radical verbal form."

"Of or pertaining to a radix or root; as a radical quantity; a radical sign. See below."

"A primitive word; a radix root or simple underived uncompounded word; an etymon."

"A primitive letter; a letter that belongs to the radix."

"One who advocates radical changes in government or social institutions especially such changes as are intended to level class inequalities; -- opposed to conservative."

"A characteristic essential and fundamental constituent of any compound; hence sometimes an atom."

"Specifically a group of two or more atoms not completely saturated which are so linked that their union implies certain properties and are conveniently regarded as playing the part of a single atom; a residue; -- called also a compound radical. Cf. Residue."

"A radical quantity. See under Radical a."

"A radical vessel. See under Radical a."