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noun. German physicist who discovered x-rays and developed roentgenography (1845-1923).
Rhymes with Roentgen Ray
noun. a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air.
noun. ['ˈreɪ'] a column of light (as from a beacon).
noun. ['ˈreɪ'] a branch of an umbel or an umbelliform inflorescence.
verb. ['ˈreɪ'] extend or spread outward from a center or focus or inward towards a center.
noun. ['ˈreɪ'] cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins.
noun. ['ˈreɪ'] any of the stiff bony spines in the fin of a fish.
noun. ['ˈreɪ'] the syllable naming the second (supertonic) note of any major scale in solmization.
noun. ['ˈreɪ'] a group of nearly parallel lines of electromagnetic radiation.