| radial veins | Venae comitantes of the raidal artery continuing from those of the radial aspect of the deep palmar arch, draining into the venae comitantes of the brachial artery in the cubital fossa. Synonym: venae radiales. (05 Mar 2000) |
|---|---|
| radiale | Origin: NL. See Radial. 1. <anatomy> The bone or cartilage of the carpus which articulates with the radius and corresponds to the scaphoid bone in man. 2. <zoology> Radial plates in the calyx of a crinoid. Source: Websters Dictionary (01 Mar 1998) |
| radialis | Synonym: radial. Origin: Mod. L. (05 Mar 2000) |
| radialis indicis artery | <anatomy, artery> Origin, radial; distribution, radial side of index finger. Synonym: arteria radialis indicis, arteria volaris indicis radialis, radial index artery. (05 Mar 2000) |
| radially | Arranged or having parts arranged like rays developing uniformly around a central axis. (09 Oct 1997) |
| radially symmetrical | Said of an organism or organ which can be cut through the centre into equal and similar parts along two or more planes, actinomorphic. (09 Oct 1997) |
| radian | <mathematics> An arc of a circle which is equal to the radius, or the angle measured by such an arc. Origin: From Radius. Source: Websters Dictionary (01 Mar 1998) |
| radiant | 1. Emitting or proceeding as from a center; rays; radiating; radiate. 2. Especially, emitting or darting rays of light or heat; issuing in beams or rays; beaming with brightness; emitting a vivid light or splendor; as, the radiant sun. "Mark what radiant state she spreads." (Milton) 3. Beaming with vivacity and happiness; as, a radiant face. 4. Giving off rays; said of a bearing; as, the sun radiant; a crown radiant. 5. <botany> Having a raylike appearance, as the large marginal flowers of certain umbelliferous plants; said also of the cluster which has such marginal flowers. <physics> Radiant energy See Radiant. Origin: L. Radians, -antis, p. Pr. Of radiare to emit rays or beams, fr. Radius ray: cf. F. Radiant. See Radius, Ray a divergent line. 1. <optics> The luminous point or object from which light emanates; also, a body radiating light brightly. 2. <geometry> A straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve. 3. <astronomy> The point in the heavens at which the apparent paths of shooting stars meet, when traced backward, or whence they appear to radiate. Source: Websters Dictionary (01 Mar 1998) |
| radiant energy | Energy contained in light rays or any other form of radiation. (05 Mar 2000) |
| radiant heat | Heat given off from any body in the form of waves, similar to light waves but of greater wavelength. (05 Mar 2000) |
| radiant intensity | The luminous flux per unit solid angle in a given direction. Synonym: candle-power, radiant intensity. (05 Mar 2000) |
| radiary | <zoology> A radiate. Origin: Cf. F. Radiaire. Source: Websters Dictionary (01 Mar 1998) |
| radiata | <zoology> An extensive artificial group of invertebrates, having all the parts arranged radially around the vertical axis of the body, and the various organs repeated symmetrically in each ray or spheromere. It includes the coelenterates and the echinoderms. Formerly, the group was supposed to be a natural one, and was considered one of the grand divisions of the animal kingdom. Origin: NL, fr. Radiatus, p. P. See Radiate. Source: Websters Dictionary (01 Mar 1998) |
| radiate | 1. To emit rays; to be radiant; to shine. "Virtues shine more clear In them [kings], and radiant like the sun at noon." (Howell) 2. To proceed in direct lines from a point or surface; to issue in rays, as light or heat. "Light radiates from luminous bodies directly to our eyes." (Locke) Origin: L. Radiatus, p. P. Of radiare to furnish with spokes or rays, to radiate, fr. Radius. See Radius, Ray a divergent line. 1. To emit or send out in direct lines from a point or points; as, to radiate heat. 2. To enlighten; to illuminate; to shed light or brightness on; to irradiate. 1. Having rays or parts diverging from a center; radiated; as, a radiate crystal. 2. <botany> Having in a capitulum large ray florets which are unlike the disk florets, as in the aster, daisy, etc. 3. <zoology> Belonging to the Radiata. Origin: L. Radiatus, p. P. <zoology> One of the Radiata. Source: Websters Dictionary (01 Mar 1998) |
| radiate crown | A fan-shaped fibre mass on the white matter of the cerebral cortex, composed of the widely radiating fibres of the internal capsule; a single layer of columnar cells derived from the cumulus oophorus, which anchor on the pellucid zone of the oocyte in a secondary follicle. Synonym: radiate crown. (05 Mar 2000) |