- 1Each of the lines in which light (and heat) may seem to stream from the sun or any luminous body, or pass through a small opening: a ray of sunlight came through the windowMore example sentences
- A Camera Obscura is when an inverted image is created by rays of light passing through a pinhole into a dark space.
- Light rays pass through the cornea and the lens and focus on the retina.
- I can't move, I'm so enraptured by the way the last luminous rays of light dance over his glowing skin.
- 1.1The straight line in which light or other electromagnetic radiation travels to a given point.More example sentences
- This was the approach of geometrical optics, which treated light as moving in straight line rays which were reflected or refracted according to simple rules.
- The easiest way to describe light rays and light cones is through geometric optics.
- Mirrors, spherical or otherwise, operate on the principle that the angle of reflection of a ray of light equals the angle at which it strikes the mirror's surface.
- 1.2 [with adjective] (rays) A specified form of nonluminous radiation: water reflects and intensifies UV raysMore example sentences
- But even more important is that it absorbs carcinogenic ultra-violet rays and electromagnetic radiation.
- A whole day of radiation of ultraviolet rays even kills the most resistant of germs.
- Look for one that promises to shield you from a broad spectrum of ultraviolet rays.
- 1.3 Mathematics Any of a set of straight lines passing through one point.More example sentences
- All coding elements redirect light so that no ray, besides the on-axis ray, travels toward the traditional geometric focus point.
- It is always wise to make a sketch of the system, including the ray bundles for the on-axis and off-axis imagery.
- 1.4 (rays) • informal , chiefly North American Sunlight considered in the context of sunbathing: Sarah’s catching some rays on a beach in Cruz BayMore example sentences
- Find out about the villa's position and orientation so you know that you do not have go to the beach in order to catch some rays.
- Midmountain, Sunshine Grill's deck lets you catch some rays over a burger or chili.
- Two researchers specializing in the psychology of health say they've found a more productive way to wean sun worshipers from catching some rays.
- 1.5An initial or slight indication of a positive or welcome quality in a time of difficulty or trouble: if only I could see some ray of hopeMore example sentences
- Most of all I feel really needed all of a sudden; I feel I can bring a slight ray of hope and variety to this ever more depressing world.
- The commissioners comment, ‘This witness was a fresh and welcome ray of hope for the Tribunal.’
- Although the concrete result of the proposal has yet to be seen, it nevertheless sparks a ray of hope for a peaceful solution in the troubled region.
- 2A thing that is arranged radially, in particular.More example sentences
- Traces of thorns can be observed on the surface of the distal part of all rays.
- All rays of the outwardly placed spicules are well developed.
- In green swordtails, the sword consists of a set of ventral fin rays that extend posteriorly beyond the caudal fin margin.
- 2.1 Botany (In a composite flower head of the daisy family) an array of ray florets arranged radially around the central disc, forming the white part of the flower head of a daisy.More example sentences
- Parenchyma rays occur throughout the xylem and phloem cells.
- In the vascular tissue of woody species, parenchyma cells include those in phloem, and the ray cells and axial parenchyma cells in xylem.
- The resin canal itself was excluded from fusiform rays.
- 2.2 (also fin ray) Zoology Each of the long, slender bony protuberances supporting the fins of most bony fishes.More example sentences
- Two to three scales bear a pore behind the inversion line until the lateral line ends at a caudal fin ray.
- The pelvic fin usually consists of a spine on each side and one fin ray.
- One of the most prominent characteristics of early vertebrates is the elongate caudal fin bearing fin rays.
- 2.3 Zoology Each radial arm of a starfish.More example sentences
- The sequence and pattern of development of supernumerary rays differs among multiradiate starfish.
verb[no object] Back to top
- 1Spread from or as if from a central point: delicate lines rayed out at each corner of her eyesMore example sentences
- So he went to where a single blackthorn limb spired above a briary thicket, rayed with fine spikes.
- The battleships ray out over the North Sea, keeping their stations accurately apart.
ray of sunshine
- • informal A person or thing that brings happiness into the lives of others.More example sentences
- Scottish fiction, for all its manifest and manifold qualities, is not blessed with many rays of sunshine.
- As P G Wodehouse famously commented in Blandings Castle: ‘It is never difficult to distinguish between a Scotsman with a grievance and a ray of sunshine.’
- Cathy said: ‘Shannon was a little star and our little ray of sunshine.’
- (chiefly Botany )More example sentences
- Senecio jacobaea exhibits geographic variation in the frequency of rayed and discoid (rayless) individuals.
- The rayless clouds dimmed, the darkening sky loomed above.
- Within the tomb no veiled and weeping sorrow sits, and in the rayless gloom is crouched no shuddering fear.
Middle English: from Old French rai, based on Latin radius 'spoke, ray'. The verb dates from the late 16th century.
- A broad, flat marine or freshwater fish with a cartilaginous skeleton, winglike pectoral fins, and a long slender tail. Many rays have venomous spines or electric organs.
More example sentences
- Order Batiformes: several families, including Rajidae (the skates)
- Participants will dive amidst one of Europe's largest collection of sharks, as well as 2000 other fish, rays and conger eels.
- The freshwater sawfish, a ray, is related to stingrays, skates, sharks, and other fishes with cartilaginous skeletons.
- Whale sharks, manta rays and even grey whales are almost common.
Middle English: from Old French raie, from Latin raia.
Entry from British & World English dictionary
Middle English re, representing (as an arbitrary name for the note) the first syllable of resonare, taken from a Latin hymn (see solmization).