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mermaid's purse
(Encyclopedia)mermaid's purse: see ray.Roentgen ray
(Encyclopedia)Roentgen ray: see X ray.Röntgen ray
(Encyclopedia)Röntgen ray: see X ray.skate
(Encyclopedia)skate, fish: see ray.torpedo , in zoology
(Encyclopedia)torpedo, fish: see ray.fluoroscope
(Encyclopedia)fluoroscope flo͝orˈəskōp [key], instrument consisting of an X-ray machine (see X ray) and a fluorescent screen that may be used by physicians to view the internal organs of the body. During medica...Gamma-Ray Observatory
(Encyclopedia)Gamma-Ray Observatory: see gamma-ray astronomy. ...Compton Gamma-Ray Observatory
(Encyclopedia)Compton Gamma-Ray Observatory: see gamma-ray astronomy. ...Robinson, Bill
(Encyclopedia)Robinson, Bill, 1878–1949, African-American tap dancer popularly known as “Bojangles,” b. Richmond, Va., as Luther Robinson. An influential virtuoso tap dancer, he was a tap innovator and repute...refraction
(Encyclopedia)refraction, in physics, deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from air into glass. O...Browse by Subject
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