Rade, rād, old form of rode.
Radial, rā′di-al, adj. shooting out like a ray or radius: pertaining to the radius of the forearm: (bot.) developing uniformly on all sides.—ns. Rādiā′le, the radiocarpal bone:—pl. Rādiā′lia; Rādiā′lis, a radial muscle, artery, or nerve:—pl. Rādiā′les; Rādialisā′tion, arrangement in radiating forms.—v.t. Rā′dialise, to make ray-like: to cause to radiate.—n. Rādial′ity, radial symmetry.—adv. Rā′dially, in the manner of a radius or of rays.—adjs. Rā′diocar′pal, pertaining to the wrist or carpus; Rā′diomus′cular, pertaining to the radius and to muscles; Rā′dio-ul′nar, pertaining to the radius and the ulna.—Radial artery, the smaller of the branches of the branchial artery at the elbow.
Radian, rā′di-an, n. the angle subtended at the centre of a circle by an arc equal to the radius.
Radiant, rā′di-ant, adj. emitting rays of light or heat: issuing in rays: beaming with light: shining: (her.) edged with rays.—n. (opt.) the luminous point from which light emanates: (astron.) the centre point from which meteoric showers proceed: (geom.) a straight line from a point about which it is conceived to revolve.—ns. Rā′diance, Rā′diancy, quality of being radiant: brilliancy: splendour.—adv. Rā′diantly.—adj. Rā′dious (obs.), radiant.—Radiant energy, energy in the form of light or radiant heat; Radiant heat, heat proceeding in rays or direct lines from a centre. [L. radians, -antis, pr.p. of radiāre, -ātum, to radiate—radius.]
Radiata, rā-di-ā′ta, n.pl. the lowest of Cuvier's four great divisions of the animal kingdom—the organs of sense and motion disposed as rays round a centre.
Radiate, rā′di-āt, v.i. to emit rays of light: to shine: to proceed in direct lines from any point or surface.—v.t. to send out in rays: to furnish with rays.—adjs. Rā′diāte, -d, formed of rays diverging from a centre: (bot.) consisting of a disc in which the florets are tubular: (min.) having crystals diverging from a centre: belonging to the Radiata: in coins, represented with rays proceeding from a centre, as a head or bust.—adv. Rā′diately, in a radiate manner: with radiation from a centre.—adj. Rādiā′tiform, having the appearance of being radiate.—adv. Rā′diatingly.—n. Rādiā′tion, act of radiating: the emission and diffusion of rays of light or heat.—adj. Rā′diative.—n. Rā′diator, a body which radiates or emits rays of light or heat: a part of a heating apparatus for a room.—adj. Rā′diatory.—ns. Rādioflagell′ata, marine animalcules; Rā′diograph, an instrument by which solar radiation is measured.—adj. Rādiolā′rian, pertaining to the ooze at the bottom of the sea, composed of the shells of Radiolā′rians, a class of marine rhizopod Protozoa, so called from their having thread-like processes of living matter radiating outwards on all sides.—ns. Rādī′olus, one of the barbules of the main shaft of a feather; Rādiom′eter, an instrument consisting of four horizontal arms of very fine glass, carefully poised so as to revolve easily on a point, the whole contained in a glass vessel almost exhausted of air—the arms move round under light or heat, more or less swiftly according to the strength of the rays.—adj. Rādiomet′ric.—ns. Rādiomicrom′eter, an instrument for measuring very small amounts of heat; Rā′diophone, an instrument for producing or transmitting sound by heat-rays.—adj. Rādiophon′ic.—ns. Rādiophon′ics, Rā′diophony, the production of sound by radiant heat; Rā′dium, a rare element whose radiations act upon photographic plates and have properties like the X-rays.
Radical, rad′i-kal, adj. pertaining to the root or origin: original: fundamental: intrinsic: primitive: implanted by nature: not derived: serving to originate: (bot.) proceeding immediately from the root: (politics) ultra-liberal, democratic.—n. a root: a primitive word or letter: one who advocates radical reform, an uncompromising democratic politician: (chem.) the base of a compound.—v.t. Rad′icalise, to make radical.—v.i. to become radical, adopt radical political principles.—n. Rad′icalism, the principles or spirit of a radical or democrat.—adv. Rad′ically.—n. Rad′icalness. [Radix.]
Radicate, rad′i-kāt, adj. deeply rooted: firmly established: (zool.) fixed at the bottom as if rooted: (conch.) adhering like a limpet.—v.t. to root: to plant or fix deeply and firmly:—pr.p. rad′icāting; pa.p. rad′icāted.—adjs. Rad′icant (bot.), sending out roots from the stem above the ground; Radicā′rian, relating to roots; Rad′icated, rooted.—ns. Radicā′tion, the act or process of radicating or taking root deeply: (bot.) the disposition of the root with respect to the ascending or descending stem; Rad′icel, a rootlet.—adjs. Radicic′olous, Radic′olous, living on roots, pertaining to the root-form of the phylloxera; Radiciflō′rous, flowering from the root; Radic′iform, like a root.—n. Rad′icle, a little root: the part of a seed which in growing becomes the root.—adjs. Rad′icōse, having a large root; Radic′ūlar, pertaining to a radicle.—n. Rad′icūle (bot.), that end of the embryo which is opposite to the cotyledons.—adj. Radic′ūlōse (bot.), covered with rootlets: radicose, having a large root. [L. radicāri, -ātus, to take root—radix, a root.]
Radish, rad′ish, n. an annual whose succulent pungent root is eaten raw as a salad.—ns. Rad′ish-fly, an American insect; Sea′side-rad′ish, the wild radish. [Fr. radis—Prov. raditz—L. radix, radicis, a root.]
Radius, rā′di-us, n. (geom.) a straight line from the centre to the circumference of a circle: anything like a radius, as the spoke of a wheel: a ray: (anat.) the exterior bone of the arm: (bot.) the ray of a flower: the movable arm of a sextant: one of the radiating lines of a geometrical spider's web:—pl. Rā′dii (ī).—ns. Rā′dius-bar, -rod, in a steam-engine, a rod pivoted at one end and connected at the other with a concentrically moving part at a fixed distance.—Radius vector (pl. Radii vectores), the distance from a fixed origin to any point of a curve. [L., a rod.]