| angiogram |
an x-ray image of blood vessels that is taken after injecting a substance that absorbs x-rays into the blood. |
| Aquadag |
in electronics, trademark for the graphite coating on the inside of some cathode ray tubes. |
| arteriography |
examination of the arteries by x-ray after injection with a radiopaque dye. |
| barium sulfate |
an opaque insoluble white powder that is used as a pigment in paints and a filler for plastics and textiles, and is swallowed as a diagnostic aid in x-ray examination of the stomach and intestines. |
| batfish |
a stingray or batlike ray found in the Pacific. [1/2 definitions] |
| beam |
a ray of light, or a group of such rays. [1/8 definitions] |
| crampfish |
see "electric ray." |
| CRT |
abbreviation of "cathode-ray tube," a vacuum tube in which a stream of electrons is accelerated and focused in a beam that produces lighted traces on a screen at one end of the tube, used in television sets, computer monitors, and the like. |
| devilfish |
a manta or other very large ray. [1/2 definitions] |
| discoid |
of a composite flower, having disk flowers only, without ray flowers. [1/3 definitions] |
| elasmobranch |
any of various fishes with a cartilaginous skeleton, such as a shark or ray. |
| electromagnetic wave |
a wave that contains a magnetic and electric component and that is created by an accelerating electric charge, such as a radio wave, x-ray, or light. |
| electron gun |
the electron-emitting cathode in a cathode ray tube together with the electromagnetic apparatus that collects and focuses the electron stream. |
| encephalogram |
an x-ray photograph of the spaces of the brain normally filled with cerebrospinal fluid, partially replaced for the procedure by air or dye. |
| incidence |
the arrival of a light ray or the like on a surface. [1/3 definitions] |
| kinescope |
a cathode-ray tube that directs a beam of electrons to reproduce a transmitted picture on a luminescent screen; picture tube. [1/3 definitions] |
| mammogram |
an x-ray picture of the breast, usu. made to check for cancerous growths. |
| mammography |
photography of the breast by x-ray, usu. for detection of cancerous growths. |
| moonbeam |
a ray of light reflected from the surface of the moon. |
| myelogram |
an x-ray photograph of the spinal cord that is taken after a radiopaque substance has been administered. |
| picture tube |
the cathode-ray tube in a television receiver, with a screen at one end on which televised images appear. |