| radar astronomy |
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noun - (astronomy) a technique that uses radar echoes to examine bodies within the solar system, obtaining information about size, shape, topography, surface density, spin etc
| | | radiant |
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noun
- A point source from which radiation is emitted.
- (astronomy) The apparent origin, in the night sky, of a meteor shower.
adjective
- Radiate, Radiating light and/or heat.
- Emitted as radiation.
- Bright, glowing or filled with light.
| | radio astronomy |
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noun
- The branch of astronomy which utilizes radio waves through the use of radio telescopes to study celestial bodies and occurances.
| | radio telescope |
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noun - (astronomy) A device for observing astronomical sources of radio waves, normally having one or more large parabolic dishes.
| | Ray |
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proper noun
- (given name, male), a diminutive of Raymond.
| | red dwarf |
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noun
- (star) A small, relatively cool star of the main sequence; most stars in the Milky Way are red dwarfs.
| | red giant |
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noun - (star) A large red coloured star with a lower surface temperature than many stars.
| | redshift |
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noun
- (context, physics) A change in the wavelength of light, in which the wavelength is longer than when it was emitted at the source.
| | rete |
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noun (plural retia)
- (anatomy) a network of blood vessels or nerves
- an anatomical part resembling or including a network
| | retrograde |
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noun
- A degenerate person.
verb (retrograd, ing)
- (intransitive) To move backwards; to recede; to retire; to decline; to revert.
- (context, intransitive, astronomy) To show retrogradation.
adjective
- Directed backwards, retreating; reverting especially inferior state, declining; inverse, reverse; movement opposite to normal or intended motion, often circular motion.
- counterproductive, Counterproductive to a desired outcome.
| | Rhea |
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proper noun
- (greekmyth): A Titan, the daughter of Uranus and Gaia, the mother of Demeter, Hades, Hera, Hestia, Poseidon, and Zeus.
- (astronomy): One of the moons of Saturn.
| | Rigel |
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proper noun
- (star) A blue supergiant star in the constellation Orion; Beta (β) Orionis. The seventh brightest star in the night sky.
| | rise |
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noun
- The action of moving upwards
- An increase (in a quantity, price, etc)
- (UK, Ireland) A pay rise (rfv-sense)
verb (rises, rising, rose, risen)
- (intransitive) To move upwards.
- We watched the balloon .
- (intransitive, of a celestial body) To appear to move upwards from behind the horizon of a planet as a result of the planet's rotation
- The sun was rising in the East.
- (intransitive) To be resurrected
- He rose from the grave.
- He is risen!
- (intransitive) of a quantity, price, etc, To increase.
| | river |
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noun
- A large stream of water that alters the nearby landscape. Occasionally rivers overflow their banks and cause floods.
- Any large flow of a liquid in a single body (e.g., 'a river of blood').
- (poker) The last card received by a player in poker
verb
- (poker) To improve one"s hand to beat another player on the final card in a poker game.
- Johnny rivered me by drawing that Ace of spades
| | roll |
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noun
- The act of rolling, or state of being rolled.
- the roll of a ball
- the roll of waves
- That which rolls; a roller
- Specifically, a heavy cylinder used to break clods.
- Specifically, one of a set of revolving cylinders, or rollers, between which metal is pressed, formed, or smoothed, as in a rolling mill; as, to pass rails through the rolls.
- That which is rolled up; as, a roll of fat, of wool, paper, cloth, etc.
- Specifically, a document written on a piece of parchment, paper, or other materials which may be rolled up; a scroll.
- Hence, an official or public document; a register; a record; also, a catalogue; a list.
- Specifically, a quantity of cloth wound into a cylindrical form; as, a roll of carpeting; a roll of ribbon.
- Specifically, A cylindrical twist of tobacco.
- A kind of shortened raised biscuit or bread, often rolled or doubled upon itself.
- (nautical) The oscillating movement of a vessel from side to side, in sea way, as distinguished from the alternate rise and fall of bow and stern called pitching.
- A heavy, reverberatory sound.
- the roll of cannon
- the roll of thunder
- The uniform beating of a drum with strokes so rapid as scarcely to be distinguished by the ear.
- (obsolete) Part; office; duty; rí´le.
- A measure of parchments, containing five dozen.
- Quotations
- 1882: Parchement is sold by the dozen, and by the roll of five dozens. — James Edwin Thorold Rogers, A History of Agriculture and Prices in England, Volume 4, p. 594.
- the rotation angle about the longitudinal axis
- the roll of an aircraft
- The act of, or total resulting from, rolling one or more dice.
- Make your roll.
- Whoever gets the highest moves first.
- (nautical) The measure of extent to which a nautical vessel rotates on its fore-and-aft axis, causing its sides to go up and down. Compare with pitch.
verb
- (ergative) To cause to revolve by turning over and over; to move by turning on an axis; to impel forward by causing to turn over and over on a supporting surface.
- roll a wheel, a ball, or a barrel
- To wrap round on itself; to form into a spherical or cylindrical body by causing to turn over and over.
- roll a sheet of paper
- roll clay or putty into a ball''
- To bind or involve by winding, as in a bandage; to inwrap; often with up
- roll up a parcel
- (ergative) To drive or impel forward with an easy motion, as of rolling.
- a river rolls its waters to the ocean
- (ergative) To utter copiously, especially with sounding words; to utter with a deep sound; -- often with forth, or out.
- roll forth someone's praises
- roll out sentences
- To press or level with a roller; to spread or form with a roll, roller, or rollers.
- roll a field
- roll paste
- roll steel rails
- (ergative) To move, or cause to be moved, upon, or by means of, rollers or small wheels.
- To beat with rapid, continuous strokes, as a drum; to sound a roll upon.
- (geometry) To apply (one line or surface) to another without slipping; to bring all the parts of (one line or surface) into successive contact with another, in such a manner that at every instant the parts that have been in contact are equal.
- To turn over in one's mind; to revolve.
- (US slang) A manner of behaving or a way of doing certain things; a general disposition toward a situation.
- I was going to kick his ass, but he wasn't worth getting all worked up over, I don't like that.
- 2006, Times Herald-Record, Tuesday, November 21, by Chris McKenna?. At http://www.recordonline.com/apps/pbcs.dll/article?AID=/20061121/NEWS/611210321.
- :"This is how we in Spring Valley," one teen reportedly boasted.
- (transitive or intransitive) To throw dice.
- (transitive) To roll dice such that they form a given pattern or total.
- If you doubles, you get an extra turn.
- With two dice, you're more likely to seven than ten.
- To turn over and over.
- The child rolled on the floor.
- To tumble in gymnastics.
- (nautical) when a nautical vessel rotates on its fore-and-aft axis, causing its sides to go up and down. Compare with pitch.
| | rule |
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noun
- A regulation, law, guideline.
- A ruler; device for measuring, a straightedge, a measure.
- Something to keep order.
verb (rul, ing)
- To regulate, be in charge of, make decisions for, reign over.
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