(Especially of change or action) relating to or affecting the fundamental nature of something; far-reaching or thorough
A free radical species that carries a charge.
A radical formed by the removal of hydrogen ions from an acid
An uncharged molecule (typically highly reactive and short-lived) having an unpaired valence electron
The straight line which is the locus of the points whose powers with respect to two given coplanar circles are equal.
The fashionable affectation of radical left-wing views
People with extreme left-wing views; the side of the political spectrum occupied by these people; (in later use) specifically = New Left.
A plane whose points have equal power with respect to two given spheres (identical with the plane containing the circle of intersection of the spheres if they intersect).
Scottish Law an owner's absolute or actual right in a piece of land or property, distinguished from another's equitable or trust rights in that property.
The sign √, which indicates the square root of the number following (or a higher root indicated by a preceding superscript numeral)
A simple uncompounded word having the form of, or directly based on, a root.
(In a system of three coplanar circles) the point of intersection of the three radical axes of each of the three pairs of circles.
The circle whose centre is the radical centre of three given circles and which intersects each circle orthogonally.
An original unchanged letter, especially a Welsh initial consonant, which is liable to be altered or mutated by a preceding word.
A thoroughgoing reform; specifically a reform of the British social and parliamentary system called for during the end of the 18th and early 19th cent. by those opposed to George III's parliamentary control.
= glacial acetic acid.
(Originally, in the philosophy of William James (1842–1910)) the theory that ultimate reality consists of pure experience; (more generally) the view that knowledge of reality can only be achieved through a rigorous and sceptical empiricism.
An adherent or advocate of radical empiricism.
Advocacy of radical left-wing measures designed to counter the traditional dominance of men over women; the movement associated with this.
Reflecting or promoting radical feminism.
A fundamental pluralism.
An adherent or advocate of a fundamental pluralism.
A member of a group of early 19th-cent. radicals whose advocacy of political reform was based on Benthamite utilitarian philosophy.
= philosophical radical.
= radical reform.
Surgical removal of the lateral wall and contents of the mastoid process, usually to treat mastoiditis; (later also, chiefly in (modified) radical mastoidectomy) this procedure combined with excision of some or all of the adjacent middle ear structures.