What is "rolling"

Rolling \Roll"ing\, a.

1. Rotating on an axis, or moving along a surface by rotation; turning over and over as if on an axis or a pivot; as, a rolling wheel or ball.

2. Moving on wheels or rollers, or as if on wheels or rollers; as, a rolling chair.

3. Having gradual, rounded undulations of surface; as, a rolling country; rolling land. [U.S.] Rolling bridge. See the Note under Drawbridge. Rolling circle of a paddle wheel, the circle described by the point whose velocity equals the velocity of the ship. --J. Bourne. Rolling fire (Mil.), a discharge of firearms by soldiers in line, in quick succession, and in the order in which they stand. Rolling friction, that resistance to motion experienced by one body rolling upon another which arises from the roughness or other quality of the surfaces in contact. Rolling mill, a mill furnished with heavy rolls, between which heated metal is passed, to form it into sheets, rails, etc. Rolling press.

   1. A machine for calendering cloth by pressure between revolving rollers.

   2. A printing press with a roller, used in copperplate printing.

      Rolling stock, or Rolling plant, the locomotives and vehicles of a railway.

      Rolling tackle (Naut.), tackle used to steady the yards when the ship rolls heavily.
      --R. H. Dana, Jr.

Roll \Roll\, v. t. [imp. & p. p. Rolled; p. pr. & vb. n. Rolling.] [OF. roeler, roler, F. rouler, LL. rotulare, fr. L. royulus, rotula, a little wheel, dim. of rota wheel; akin to G. rad, and to Skr. ratha car, chariot. Cf. Control, Roll, n., Rotary.]

1. 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; as, to roll a wheel, a ball, or a barrel.

2. To wrap round on itself; to form into a spherical or cylindrical body by causing to turn over and over; as, to roll a sheet of paper; to roll parchment; to roll clay or putty into a ball.

3. To bind or involve by winding, as in a bandage; to inwrap; -- often with up; as, to roll up a parcel.

4. To drive or impel forward with an easy motion, as of rolling; as, a river rolls its waters to the ocean.

   The flood of Catholic reaction was rolled over Europe.
   --J. A. Symonds.

5. To utter copiously, esp. with sounding words; to utter with a deep sound; -- often with forth, or out; as, to roll forth some one's praises; to roll out sentences.

   Who roll'd the psalm to wintry skies.
   --Tennyson.

6. To press or level with a roller; to spread or form with a roll, roller, or rollers; as, to roll a field; to roll paste; to roll steel rails, etc.

7. To move, or cause to be moved, upon, or by means of, rollers or small wheels.

8. To beat with rapid, continuous strokes, as a drum; to sound a roll upon.

9. (Geom.) 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 suck manner that at every instant the parts that have been in contact are equal.

10. To turn over in one's mind; to revolve.

    Full oft in heart he rolleth up and down The beauty of these florins new and bright.
    --Chaucer.

    To roll one's self, to wallow.

    To roll the eye, to direct its axis hither and thither in quick succession.

    To roll one's r's, to utter the letter r with a trill.

14c., past participle adjective from roll (v.). Of prairie land from 1819. From mid-15c. as a verbal noun. Rolling pin is recorded from late 15c. Rolling paper for cigarettes, etc., is from 1969. Rolling stock "wheeled vehicles on a railroad" (locomotives, carriages, etc.) is from 1853.\nThe rollyng stone neuer gatherth mosse. [John Heywood, "A dialogue conteinying the nomber in effect of all the proverbes in the Englishe tongue," 1546]

n. The act by which something is rolled. vb. 1 (present participle of roll English) 2 Staggered in time and space; used with blackout, brownout, introduction.

1. adj. characterized by reverberation; "a resonant voice"; "hear the rolling thunder" [syn: resonant, resonating, resounding, reverberating, reverberative]

2. uttered with a trill; "she used rolling r's as in Spanish" [syn: rolled, trilled]

3. moving in surges and billows and rolls; "billowing smoke from burning houses"; "the rolling fog"; "the rolling sea"; "the tumbling water of the rapids" [syn: billowing, tumbling]

1. n. a deep prolonged sound (as of thunder or large bells) [syn: peal, pealing, roll]

2. the act of robbing a helpless person; "he was charged with rolling drunks in the park"

3. propelling something on wheels [syn: wheeling]

Rolling is a 2007 independent drama film about a diverse group of characters who are linked by the drug MDMA ("ecstasy"). The faux documentary takes a tough yet entertaining realistic look at how this drug affects relationships and responsibilities. The film had its world premiere at the San Francisco Independent Film Festival on February 11, 2007. It is the directorial feature debut of Billy Samoa Saleebey.

Rolling a contract is an investment concept meaning trading out of a standard contract and then buying the contract with next longest maturity, so as to maintain a position with constant maturity.

Rolling is a type of motion that combines rotation (commonly, of an axially symmetric object) and translation of that object with respect to a surface (either one or the other moves), such that, if ideal conditions exist, the two are in contact with each other without sliding.

Rolling where there is no sliding is referred to as pure rolling. By definition, there is no sliding when the instantaneous velocity of the rolling object in all the points in which it contacts the surface is the same as that of the surface; in particular, for a reference plane in which the rolling surface is at rest, the instantaneous velocity of the point of contact of the rolling object is zero.

In practice, due to small deformations near the contact area, some sliding and energy dissipation occurs. Nevertheless, the resulting rolling resistance is much lower than sliding friction, and thus, rolling objects, typically require much less energy to be moved than sliding ones. As a result, such objects will more easily move, if they experience a force with a component along the surface, for instance gravity on a tilted surface, wind, pushing, pulling, or torque from an engine. Unlike most axially symmetrical objects, the rolling motion of a cone is such that while rolling on a flat surface, its center of gravity performs a circular motion, rather than linear motion. Rolling objects are not necessarily axially-symmetrical. Two well known non-axially-symmetrical rollers are the Reuleaux triangle and the Meissner bodies. The oloid and the sphericon are members of a special family of developable rollers that develop their entire surface when rolling down a flat plane. Objects with corners, such as dice, roll by successive rotations about the edge or corner which is in contact with the surface.

Rolling is to move forward by causing to rotate over a surface.

Rolling may also refer to:

• Rolling (finance), trading contracts to maintain a given maturity
• Rolling (metalworking), a fabricating process
• Rolling (physiology), an aspect of Leukocyte extravasation in which white blood cells roll along a vessel wall
• "Rolling", the first track of Soul Coughing's third album, El Oso
• Rolling (video game), an inline skating video game
• Rolling (film), a 2007 faux documentary
• Rolling, Bous, Luxembourg
• Rolling, Wisconsin, USA
• Being intoxicated on the drug MDMA
• "Rolling" is used among practitioners of Brazilian jiu-jitsu to describe sparring.
• "Rolling", an episode of the television series Teletubbies
• Rolling (television), a problem with early TV sets

In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. The concept is similar to the rolling of dough. Rolling is classified according to the temperature of the metal rolled. If the temperature of the metal is above its recrystallization temperature, then the process is known as hot rolling. If the temperature of the metal is below its recrystallization temperature, the process is known as cold rolling. In terms of usage, hot rolling processes more tonnage than any other manufacturing process, and cold rolling processes the most tonnage out of all cold working processes. Roll stands holding pairs of rolls are grouped together into rolling mills that can quickly process metal, typically steel, into products such as structural steel ( I-beams, angle stock, channel stock, and so on), bar stock, and rails. Most steel mills have rolling mill divisions that convert the semi-finished casting products into finished products.

There are many types of rolling processes, including ring rolling, roll bending, roll forming, profile rolling, and controlled rolling.

Rolling is an extreme sports video game released in 2003 for PlayStation 2 and Xbox. Subsequent Game Boy Advance and Gamecube versions were cancelled due to a declining interest in extreme sports titles. To date, it is one of the few other games depicting aggressive inline skating apart from Aggressive Inline and the Jet Set Radio series. It was originally developed by the now defunct Rage Software, who were aiming to create a more authentic recreation of the sport (the box art claims the game features 250 tricks), unlike Aggressive Inline which focused on exaggerated, fantasy-themed levels and high scoring, fairly unrealistic tricks.

Players can choose to skate as one of the twenty available skaters (excluding the twenty first, and hidden, skater) and work their way through a progressively difficult "career mode" featuring a total of fourteen levels, gaining reputation, sponsorship deals, as well as unlocking new 'tricks' and videos of the pro skaters.