ray
1 Americannoun
noun
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a narrow beam of light.
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a gleam or slight manifestation.
a ray of hope.
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a raylike line or stretch of something.
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light or radiance.
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a line of sight.
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Physics, Optics.
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any of the lines or streams in which light appears to radiate from a luminous body.
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the straight line normal to the wave front in the propagation of radiant energy.
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a stream of material particles all moving in the same straight line.
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Mathematics.
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one of a system of straight lines emanating from a point.
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Also called half-line. the part of a straight line considered as originating at a point on the line and as extending in one direction from that point.
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any of a system of parts radially arranged.
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Zoology.
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one of the branches or arms of a starfish or other radiate animal.
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one of the bony or cartilaginous rods in the fin of a fish.
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Botany.
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one of the branches of an umbel.
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(in certain composite plants) the marginal part of the flower head.
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Astronomy. one of many long, bright streaks radiating from some of the large lunar craters.
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a prominent upright projection from the circlet of a crown or coronet, having a pointed or ornamented termination.
verb (used without object)
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to emit rays.
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to issue in rays.
verb (used with object)
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to send forth in rays.
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to throw rays upon; irradiate.
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to subject to the action of rays, as in radiotherapy.
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Informal. to make a radiograph of; x-ray.
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to furnish with rays or radiating lines.
idioms
noun
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John, 1627?–1705, English naturalist.
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Man 1890–1976, U.S. painter and photographer.
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Satyajit 1921–92, Indian film director.
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Cape, a promontory at the SW extremity of Newfoundland, Canada, on the Cabot Strait, at the entrance of the Gulf of St. Lawrence.
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a male given name, form of Raymond.
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Also Raye a female given name, form of Rachel.
noun
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a narrow beam of light; gleam
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a slight indication, esp of something anticipated or hoped for
a ray of solace
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maths a straight line extending from a point
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a thin beam of electromagnetic radiation or particles
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any of the bony or cartilaginous spines of the fin of a fish that form the support for the soft part of the fin
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any of the arms or branches of a starfish or other radiate animal
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astronomy any of a number of bright streaks that radiate from the youngest lunar craters, such as Tycho; they are composed of crater ejecta not yet darkened, and extend considerable distances
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botany any strand of tissue that runs radially through the vascular tissue of some higher plants See medullary ray
verb
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(of an object) to emit (light) in rays or (of light) to issue in the form of rays
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(intr) (of lines, etc) to extend in rays or on radiating paths
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(tr) to adorn (an ornament, etc) with rays or radiating lines
noun
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John . 1627–1705, English naturalist. He originated natural botanical classification and the division of flowering plants into monocotyledons and dicotyledons
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Man , real name Emmanuel Rudnitsky . 1890–1976, US surrealist photographer
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Satyajit (ˈsætjədʒɪt). 1921–92, Indian film director, noted for his Apu trilogy (1955–59)
noun
noun
noun
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A thin line or narrow beam of light or other radiation.
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A geometric figure consisting of the part of a line that is on one side of a point on the line.
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See ray flower
Related Words
See gleam.
Other Word Forms
- raylike adjective
Etymology
Origin of ray1
First recorded in 1275–1325; Middle English rai(e), raye, (from Old French rai ) or directly from Latin raia
Origin of ray1
First recorded in 1350–1400; Middle English rai, raie, raye, from Old French rai “beam of light; spoke of a wheel,” from Latin radius radius
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The UK will see a significant partial solar eclipse on 12 August, when the Moon covers a large part of the Sun's rays as it passes between the Earth and Sun.
From BBC
Most of that radiation comes in the form of gamma rays and other high-energy particles that are invisible to Webb's infrared instruments.
From Science Daily
The timing was especially telling: the new outflows appeared in the images while NASA's Fermi Gamma-ray Space Telescope was also detecting high-energy gamma rays, directly connecting the shock-powered radiation to those colliding streams.
From Science Daily
Using multi-scale synchrotron X ray techniques and a high-resolution transmission electron microscope, the researchers observed that reactions inside single-crystal particles do not occur evenly.
From Science Daily
Measurements show that this distant supernova closely matches the brightness and spectral features of SN 1998bw, a well known supernova linked to a gamma ray burst that exploded much closer to Earth.
From Science Daily
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.