tube Rœntgen

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• X-ray tube — (Physics) A vacuum tube suitable for producing R[ o]ntgen rays. [Webster 1913 Suppl.] …   The Collaborative International Dictionary of English

• Focus tube — Focus Fo cus (f[=o] k[u^]s), n.; pl. E. {Focuses} (f[=o] k[u^]s*[e^]z), L. {Foci} (f[=o] s[imac]). [L. focus hearth, fireplace; perh. akin to E. bake. Cf. {Curfew}, {Fuel}, {Fusil} the firearm.] 1. (Opt.) A point in which the rays of light meet,… …   The Collaborative International Dictionary of English

• Rцntgen — Rцnt·gen (rentґgen) Wilhelm Konrad, 1845–1923. German physicist. For his discovery of x rays in 1895, while experimenting with a cathode ray tube, he received the first Nobel prize in physics in 1901 …   Medical dictionary

• Roentgen ray — Rontgen ray R[ o]ntgen ray, Roentgen ray Roentgen ray [see {R[ o]ntgen}.] (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… …   The Collaborative International Dictionary of English

• Rontgen ray — R[ o]ntgen ray, Roentgen ray Roentgen ray [see {R[ o]ntgen}.] (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… …   The Collaborative International Dictionary of English

• X rays — Rontgen ray R[ o]ntgen ray, Roentgen ray Roentgen ray [see {R[ o]ntgen}.] (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… …   The Collaborative International Dictionary of English

• Bundle of rays — Ray Ray, n. [OF. rai, F. rais, fr. L. radius a beam or ray, staff, rod, spoke of a wheel. Cf. {Radius}.] 1. One of a number of lines or parts diverging from a common point or center, like the radii of a circle; as, a star of six rays. [1913… …   The Collaborative International Dictionary of English

• Extraordinary ray — Ray Ray, n. [OF. rai, F. rais, fr. L. radius a beam or ray, staff, rod, spoke of a wheel. Cf. {Radius}.] 1. One of a number of lines or parts diverging from a common point or center, like the radii of a circle; as, a star of six rays. [1913… …   The Collaborative International Dictionary of English

• Ordinary ray — Ray Ray, n. [OF. rai, F. rais, fr. L. radius a beam or ray, staff, rod, spoke of a wheel. Cf. {Radius}.] 1. One of a number of lines or parts diverging from a common point or center, like the radii of a circle; as, a star of six rays. [1913… …   The Collaborative International Dictionary of English

• Pencil of rays — Ray Ray, n. [OF. rai, F. rais, fr. L. radius a beam or ray, staff, rod, spoke of a wheel. Cf. {Radius}.] 1. One of a number of lines or parts diverging from a common point or center, like the radii of a circle; as, a star of six rays. [1913… …   The Collaborative International Dictionary of English

• Ray — Ray, n. [OF. rai, F. rais, fr. L. radius a beam or ray, staff, rod, spoke of a wheel. Cf. {Radius}.] 1. One of a number of lines or parts diverging from a common point or center, like the radii of a circle; as, a star of six rays. [1913 Webster]… …   The Collaborative International Dictionary of English