2. A slight indication of something positive in a difficult or worrying situation a ray of hope.
3. A thin beam of radiant energy or particles.
4. A straight line that extends from a point infinitely in one direction.
5. An arm of a starfish or other animal with body parts radiating from the center.
6. A bright streak on the lunar surface which radiates from a crater.
7. In botany, a distinct strand of tissue running radially through the conducting tissues in the stem of a plant.
8. A fish with a cartilaginous skeleton, a horizontally flat head and body, broad pectoral fins, and a tapering tail.
9. Etymology: from Old French rai, rais, "ray, spoke"; from Latin radius, "ray, spoke, staff, rod".
Mr. Villafane carves and composes many pumpkins and creates additional structures with other materials for the pleasure of viewers.
A click on this entry will take you to his home page where you can view many more of his achievements and see some interesting videos about his work
The cathode-ray tubes are used in oscilloscopes, radar, television sets, and computer monitors.
Cosmic rays are streams of ionizing radiations from space, largely of protons, alpha particles, and other atomic nuclei.
Cosmic rays are very high energy nuclei moving at velocities close to that of light which are probably produced by supernova explosions.
On striking the Earth's atmosphere, they produce cascades of other particles (by collision with nuclei in the atmosphere) called air showers.
Advances in instrumentation and improved observational techniques have led to the discovery of an increasing number of X-ray sources.
By the late 20th century, thousands of these objects had been detected throughout the universe.
X-rays possess the capabilities of penetrating most substances (to varying extents), of acting on a photographic film or plate (permitting radiography), and of causing a fluorescent screen to give off light (permitting fluoroscopy).
Formerly called a Roentgen ray, in low doses X-rays are used for making images that help to diagnose disease, and in high doses to treat cancer.