释义 |
ra·di·al I. \ˈrādēəl\ adjective Etymology: Medieval Latin radialis, from Latin radius ray, beam + -alis -al — more at ray 1. : issuing in rays : relating to rays of light < intense radial heat is applied — Chem. Abstracts > 2. a. : arranged or having parts arranged like rays < radial blades in a blower > < most cities show a radial pattern of main highways leading outward from their center — C.L.White & G.T.Renner > < young dome mountains and volcanoes have radial drainage lines — A.K.Lobeck > < radial seating in an auditorium > b. : being an architectural plan in which the disposition is radial as distinguished from longitudinal < radial plan of a church > 3. a. : relating to or placed like a radius < radial blocks for chimney-construction — L.A.Harding > : moving or taking place along a radius : having the direction of a radius < radial acceleration > < radial velocity > b. : characterized by divergence from or as if from a center 4. a. : of, relating to, or adjacent to a bodily radius (as the bone of the forearm or the ray of a starfish) b. : being any of various plates of a crinoid that lie between the basal and brachial plates 5. a. : developing uniformly around a central axis — opposed to dorsiventral b. : relating to a ray or ray flower c. : having the xylem and phloem lying on alternate radii of the axis usually separated by nonvascular tissue < a radial actinostele > II. noun (-s) 1. a. : radial part: as (1) : a bar at right angles to a curved part (as in an arch) (2) : the radial arm or quadrant on which the change wheels are secured in a screw-cutting lathe b. : any of a system of radial lines : ray; specifically : a line of position radiating from a radio navigational aid transmitter 2. a. : a body part (as an artery, nerve, or plate) lying near or following the course of the radius; sometimes : radiale b. : hypercoracoid 3. : radial engine III. noun : radial tire herein |