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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. The most determined exertions of that authority, against them, only showed their radical independence. Burke.

In a radical manner; at, or from, the origin or root; fundamentally; as, a scheme or system radically wrong or defective.

A number or quantity which is arbitrarily made the fundamental number of any system; a base. Thus, 10 is the radix, or base, of the common system of logarithms, and also of the decimal system of numeration.

Relating to reason; not physical; mental. Moral philosophy was his chiefest end; for the rational, the natural, and mathematics . . . were but simple pastimes in comparison of the other. Sir T. North.

A vocal or instrumental performance by one person; -- distinguished from concert; as, a song recital; an organ, piano, or violin recital.

Hidden from the mental or intellectual view; secret; abstruse; as, recondite causes of things.

A small ornamental leguminous tree of the American species of the genus Cercis. See Judas tree, under Judas.

The law that objects which have been previously combined as part of a single mental state tend to recall or suggest one another; -- adopted by many philosophers to explain the phenomena of the association of ideas.

To place in or under by a mental or rational process; to assign to, as a class, a cause, source, a motive, reason, or ground of explanation; as, he referred the phenomena to electrical disturbances. To refer one's self, to have recourse; to betake one's self; to make application; to appeal. [Obs.] I'll refer me to all…

Necessarily assumed by the mind as fundamental to all other knowledge; furnishing fundamental principles; as, the regulative principles, or principles a priori; the regulative faculty. Sir W. Hamilton.

To take notice of, or to observe, mentally; as, to remark the manner of a speaker.

To cut off; to abrogate; to annul. The blessed Jesus . . . did sacramentally rescind the impure relics of Adam and the contraction of evil customs. Jer. Taylor.

The portion of the sacramental elements reserved for purposes of devotion and for the communion of the absent and sick.

serve; he has evidence or arguments in reserve. -- Reserve air. (Physiol.) Same as Supplemental air, under Supplemental.

the most violent expiratory effort. It amounts to from 75 to 100 cubic inches. Cf. Supplemental air, under Supplemental. -- Residual error. (Mensuration) See Error, 6 (b). -- Residual figure (Geom.), the figure which remains after a less figure has been taken from a greater one. -- Residual magnetism (Physics), rem…

A state of quiet or repose; a cessation from motion or labor; tranquillity; as, rest from mental exertion; rest of body or mind. Chaucer. Sleep give thee all his rest! Shak.

rom motion or action, in any manner; hindrance of the will, or of any action, physical or mental. No man was altogether above the restrains of law, and no man altogether below its protection. Macaulay.

late leaf; a reticulated surface; a reticulated wing of an insect. Reticulated glass, ornamental ware made from glass in which one set of white or colored lines seems to meet and interlace with another set in a different plane. -- Reticulated micrometer, a micrometer for an optical instrument, consisting of a reticule…

A fundamental change in political organization, or in a government or constitution; the overthrow or renunciation of one government, and the substitution of another, by the governed. The violence of revolutions is generally proportioned to the degree of the maladministration which has produced them. Macaulay.…

cis and three longitudinal rows of teeth on the radula. It includes many of the large ornamental shells, as the miters, murices, olives, purpuras, volutes, and whelks. See Illust. in Append.