rad

n. [ radiation absorbed dose. ] A unit of measurement of the amount of ionizing radiation absorbed by an object, equal to an energy of 100 ergs per gram of irradiated material (equal to 0.01 gray). [ PJC ]

n. [ acronym from RAdio Detection And Ranging. ] 1. An electronic device designed to detect objects at a distance, and determine their distance from the device, by transmitting a pulse of radio waves and measuring the time required for the echo of the pulse to return to the emitting device; as, the radar showed a plane approaching rapidly. For more information of radar, see the article What is Radar?. [ acronym ] [ PJC ]

2. The method of detecting objects, finding their distance, or determining their speed, by use of a radar{ 1 } device; as, modern radar can detect objects as small as raindrops. [ PJC ]

obs. imp. of Read, Rede. Chaucer. [ 1913 Webster ]

n. [ Cf. Ruddle. ] A red pigment used in marking sheep, and in some mechanical processes; ruddle. “A raddle of rouge.” Thackeray. [ 1913 Webster ]

n. [ Cf. G. räder, rädel, sieve, or perhaps E. reed. ] 1. A long, flexible stick, rod, or branch, which is interwoven with others, between upright posts or stakes, in making a kind of hedge or fence. [ 1913 Webster ]

2. A hedge or fence made with raddles; -- called also raddle hedge. Todd. [ 1913 Webster ]

3. An instrument consisting of a wooden bar, with a row of upright pegs set in it, used by domestic weavers to keep the warp of a proper width, and prevent tangling when it is wound upon the beam of the loom. [ 1913 Webster ]

v. t. To interweave or twist together. [ 1913 Webster ]

Raddling or working it up like basket work. De Foe. [ 1913 Webster ]

v. t. To mark or paint with, or as with, raddle. “Whitened and raddled old women.” Thackeray. [ 1913 Webster ]

n. (Zool.) The ruddock. [ Prov. Eng. ] [ 1913 Webster ]