单词 | Roentgen |
释义 | Roentgen /rent"geuhn, -jeuhn, runt"-/; for 1 also Ger. /rdduent"geuhn/, n. 1. Wilhelm Konrad /wil"helm kon"rad/; Ger. /vil"helm kawn"rddaht/, 1845-1923, German physicist: discoverer of x-rays 1895; Nobel prize 1901. 2. (l.c.) Physics. a unit of exposure dose that measures x-rays or gamma rays in terms of the ions or electrons produced in dry air at 0° C and one atmosphere, equal to the amount of radiation producing one electrostatic unit of positive or negative charge per cubic centimeter of air. Abbr.: r, R adj. 3. (sometimes l.c.) of or pertaining to Wilhelm Roentgen, the Roentgen unit, or esp. to x-rays. Also, Röntgen. |
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