Ray Grass - Law Dictionary Search Results
Home Dictionary Name: ray grassRay grass
A perennial European grass Lolium perenne called also rye grass and red darnel See Darnel and Grass...
darnel
Any grass of the genus Lolium esp the Lolium temulentum bearded darnel the grains of which have been reputed poisonous Other species as Lolium perenne rye grass or ray grass and its variety Lolium Italicum Italian rye grass are highly esteemed for pasture and for making hay...
X-ray
X-ray, a radiogram made by exposing photographic film to X-rays; used in medical diagnosis.X-ray, are special pictures of the inside of your body. A doctor will decide when you need an x-ray and what body part needs to be x-rayed. An x-ray machine, not a camera, is used to take these pictures, when the picture comes out it won't like the ones in your photo album, but doctors have learnt how to look at these pictures. Doctors can see broken bones, lung infections, and more.(1)(a) Relatively high-energy photon having a wavelength in the approximate range from 0.01 to 10 nanometers.(b) A stream of such photons, used for their penetrating power in radiography, radiology, radiotherapy, and scientific research. Often used in the plural. Also called reontgen ray.(2) A photograph taken with x-rays.Means electromagnetic radiation of short wave-length produced when high-speed electrons strike a solid target....
Gamma ray
A very penetrating electromagnetic ray not appreciably deflected by a magnetic or electric field emitted by radioactive substances Gamma rays are photons of electromagnetic radiation having a wavelength shorter than that of X rays i e shorter than 01 nanometer and are correspondingly more penetrating than X rays In addition to being given off in certain types of radioactive decay they may be found in cosmic radiation though they are largely absorbed by the earths atmosphere Gamma ray detectors orbited above the atmosphere have found bursts of gamma radiation in some cases associated with visually observed supernova explosions but in most cases from unidentified sources...
Roumlntgen ray
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 specifically to electromagnetic radiation having wavelengths from 10 3 nm to 10 nm immediately below ultraviolet radiation on the wavelength scale Roumlntgen rays are noted for their penetration of opaque substances as wood and flesh their action on photographic plates and their fluorescent effects They were called X rays by their discoverer W K Roumlntgen They are one of the forms of ionizing radiation which can have damaging effects on living cells They also ionize gases but cannot be reflected or polarized or deflected by a magnetic field They are used in examining opaque objects especially in medicine for visualizing organs and other objects inside the human body as for locating fractures or bullets and examining internal organs for abnormalities...
Lenard rays
Rays emanating from the outer surface of a plate composed of any material permeable by cathode rays as aluminium which forms a portion of a wall of a vacuum tube or which is mounted within the tube and exposed to radiation from the cathode Lenard rays are similar in all their known properties to cathode rays So called from the German physicist Philipp Lenard b 1862 who first described them...
Quitch grass
A perennial grass Agropyrum repens having long running rootstalks by which it spreads rapidly and pertinaciously and so becomes a troublesome weed Also called couch grass quack grass quick grass twitch grass See Illustration in Appendix...
Bermuda grass
A kind of grass Cynodon Dactylon esteemed for pasture in the Southern United States It is a native of Southern Europe but is now wide spread in warm countries called also scutch grass and in Bermuda devil grass...
Bunch grass
A grass growing in bunches and affording pasture In California Atropis tenuifolia Festuca scabrella and several kinds of Stipa are favorite bunch grasses In Utah Eriocoma cuspidata is a good bunch grass...
Gama grass
A species of grass Tripsacum dactyloides tall stout and exceedingly productive cultivated in the West Indies Mexico and the Southern States of North America as a forage grass called also sesame grass...
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