| NGR | narrow gauze roll; nasogastric replacement |
|---|---|
| H0 | null hypothesis |
| H1 | alternative hypothesis |
| LNH | large number hypothesis |
| TRH | tension-reducing hypothesis; thyrotropin-releasing hormone |
| (3)H | hypothesis that |
|---|---|
| ROPS | Roll-over protective structures |
| ROT | Roll-over test |
| roll | 1. The act of rolling, or state of being rolled; as, the roll of a ball; the roll of waves. 2. That which rolls; a roller. Specifically: A heavy cylinder used to break clods. 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. 3. 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. "Busy angels spread The lasting roll, recording what we say." (Prior) Hence, an official or public document; a register; a record; also, a catalogue; a list. "The rolls of Parliament, the entry of the petitions, answers, and transactions in Parliament, are extant." (Sir M. Hale) "The roll and list of that army doth remain." (Sir J. Davies) A quantity of cloth wound into a cylindrical form; as, a roll of carpeting; a roll of ribbon. A cylindrical twist of tobacco. 4. A kind of shortened raised biscuit or bread, often rolled or doubled upon itself. 5. 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. 6. A heavy, reverberatory sound; as, the roll of cannon, or of thunder. 7. The uniform beating of a drum with strokes so rapid as scarcely to be distinguished by the ear. 8. Part; office; duty; role. Long roll, a prolonged roll of the drums, as the signal of an attack by the enemy, and for the troops to arrange themselves in line. Master of the rolls. See Master. Roll call, the act, or the time, of calling over a list names, as among soldiers. Rolls of court, of parliament (or of any public body), the parchments or rolls on which the acts and proceedings of that body are engrossed by the proper officer, and which constitute the records of such public body. To call the roll, to call off or recite a list or roll of names of persons belonging to an organization, in order to ascertain who are present or to obtain responses from those present. Synonym: List, schedule, catalogue, register, inventory. See List. Origin: F. Role a roll (in sense 3), fr. L. Rotulus little wheel, LL, a roll, dim. Of L. Rota a wheel. See Roll, and cf. Role, Rouleau, Roulette. 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, especially. 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. <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 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. Origin: 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, Rotary. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| roll sulfur | Sublimed sulfur melted and cast in cylindrical molds; sometimes called brimstone. (05 Mar 2000) |
| roll tube | A modification of the plate culture; a seeded medium containing agar is placed in a test tube which is rolled or spun horizontally until the medium solidifies evenly on the interior of the tube. (05 Mar 2000) |
| roll-tube culture | A culture in a tube of medium which has been melted and allowed to solidify while the tube is being spun; the inside of the tube is thereby coated with a thin layer of solidified medium. (05 Mar 2000) |
| scleral roll | A ridge of the sclera at the internal scleral sulcus from which ciliary muscle fibres take origin. Synonym: scleral roll. Vascular spur, partial septum between vessels (arteries and veins) at the level of fusion or branching at acute angle. See: calcar. (05 Mar 2000) |
| iliac roll | A sausage-shaped, often painful, nonfluctuating mass, with convexity to the right, palpable in the left iliac fossa, due to induration of the walls of the sigmoid flexure. (05 Mar 2000) |
| fascine roll | <botany> A thick roll consisting of branches, the inner part being dead material, the outer consisting of live branches. (09 Oct 1997) |
| apple jelly nodules | Descriptive term for the papular lesions of lupus vulgaris, as they appear on diascopy. (05 Mar 2000) |
| cardiac jelly | Gelatinous extracellular material that lies between endocardium and myocardium in the embryo. (18 Nov 1997) |
| glycerin jelly | A preparation made of equal parts of gelatin and glycerin; a firm mass liquefying at gentle heat; it is used as a vehicle for suppositories and urethral bougies. Synonym: glycerin jelly, glycerogelatin, glycogelatin. (05 Mar 2000) |
| petroleum jelly | <pharmacology> A semisolid unctuous substance, neutral, and without taste or odour, derived from petroleum by distilling off the lighter portions and purifying the residue. It is a yellowish, fatlike mass, transparent in thin layers, and somewhat fluorescent. It is used as a bland protective dressing, and as a substitute for fatty materials in ointments. Petrolatum is the official name for the purified product. Cosmoline and vaseline are commercial names for substances essentially the same, but differing slightly in appearance and consistency or fusibility. Source: Websters Dictionary (01 Mar 1998) |
| Wharton's jelly | <obstetrics> Viscous hyaluronic acid rich jelly found in the umbilical cord. (18 Nov 1997) |
| currant jelly clot | A jelly-like mass of red blood cells and fibrin formed by the in vitro or postmortem clotting of whole or sedimented blood. (05 Mar 2000) |
| sea jelly | <zoology> A medusa, or jellyfish. Source: Websters Dictionary (01 Mar 1998) |
| interlaminar jelly | Term introduced by B.M. Patten for the gelatinous material between ectoderm and endoderm that serves as the substrate on which mesenchymal cells migrate. (05 Mar 2000) |
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