roe,

n. [ For roan, OE. rowne, akin to G. rogen, OHG. rogan, Icel. hrogn, Dan. rogn, ravn, Sw. rom; of uncertain origin; cf. Gr. &unr_;&unr_;&unr_; pebble, Skr. &unr_;arkarā gravel. ] 1. (Zool.) The ova or spawn of fishes and amphibians, especially when still inclosed in the ovarian membranes. Sometimes applied, loosely, to the sperm and the testes of the male. [ 1913 Webster ]

2. A mottled appearance of light and shade in wood, especially in mahogany. [ 1913 Webster ]

n. [ OE. ro, AS. rāh; akin to D. ree, G. reh, Icel. rā, SW. rå. ] (Zool.) (a) A roebuck. See Roebuck. (b) The female of any species of deer. [ 1913 Webster ]

n. [ 1st roe + buck. ] (Zool.) A small European and Asiatic deer (Capreolus capraea) having erect, cylindrical, branched antlers, forked at the summit. This, the smallest European deer, is very nimble and graceful. It always prefers a mountainous country, or high grounds. [ 1913 Webster ]

a. (Zool.) Filled with roe. [ 1913 Webster ]

n. (Zool.) The roebuck. [ 1913 Webster ]

a. Of or pertaining to the German physicist Wilhelm Konrad Röntgen, or the rays discovered by him; as, Röntgen apparatus. [ Webster 1913 Suppl. ]

v. t. (Physics) To render (air or other gas) conducting by the passage of Röntgen rays. [ Webster 1913 Suppl. ]

the Anglicised spelling of Röntgen ray. Same as X ray. [ PJC ]

n. [ OE. ro, AS. rāh; akin to D. ree, G. reh, Icel. rā, SW. rå. ] (Zool.) (a) A roebuck. See Roebuck. (b) The female of any species of deer. [ 1913 Webster ]

n. [ 1st roe + buck. ] (Zool.) A small European and Asiatic deer (Capreolus capraea) having erect, cylindrical, branched antlers, forked at the summit. This, the smallest European deer, is very nimble and graceful. It always prefers a mountainous country, or high grounds. [ 1913 Webster ]

a. (Zool.) Filled with roe. [ 1913 Webster ]

n. (Zool.) The roebuck. [ 1913 Webster ]

a. Of or pertaining to the German physicist Wilhelm Konrad Röntgen, or the rays discovered by him; as, Röntgen apparatus. [ Webster 1913 Suppl. ]

v. t. (Physics) To render (air or other gas) conducting by the passage of Röntgen rays. [ Webster 1913 Suppl. ]

the Anglicised spelling of Röntgen ray. Same as X ray. [ PJC ]

. [ see Röntgen. ] (Physics) An X-ray; originally, the term was applied to any of the rays produced when cathode rays strike upon surface of a solid (as the wall of the vacuum tube), but now it refers specifically to electromagnetic radiation having wavelengths from 10-3 nm to 10 nm, immediately below ultraviolet radiation on the wavelength scale. Röntgen rays are noted for their penetration of opaque substances, as wood and flesh, their action on photographic plates, and their fluorescent effects. They were called X rays by their discoverer, W. K. Röntgen. They are one of the forms of ionizing radiation, which can have damaging effects on living cells. They also ionize gases, but cannot be reflected, or polarized, or deflected by a magnetic field. They are used in examining opaque objects, especially in medicine for visualizing organs and other objects inside the human body, as for locating fractures or bullets, and examining internal organs for abnormalities. [ Webster 1913 Suppl. +PJC ]