| ladder | 1. A frame usually portable, of wood, metal, or rope, for ascent and descent, consisting of two side pieces to which are fastened cross strips or rounds forming steps. "Some the engines play, And some, more bold, mount ladders to the fire." (Dryden) 2. That which resembles a ladder in form or use; hence, that by means of which one attains to eminence. "Lowliness is young ambition's ladder." (Shak) Fish ladder. See Fish. Ladder beetle, a spiral marine shell of the genus Scalaria. See Scalaria. Origin: OE. Laddre, AS. Hlder, hldder; akin to OFries. Hladder, OHG.leitara, G. Leiter, and from the root of E. Lean, v. See Lean, and cf. Climax. Source: Websters Dictionary (01 Mar 1998) |
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| ladder splint | A flexible splint consisting of two stout parallel wires with finer cross wires. Synonym: Cramer wire splint. (05 Mar 2000) |
| laddering | Apoptotic cells show a regular pattern of oligonucleotide sizes on electrophoretic gels, the ladder like arrangement is a consequence of the cleavage of the DNA strand between nucleosome beads by endonucleases as part of the process by which cell death occurs. See: apoptosis. (18 Nov 1997) |
| sequence ladder | The array of bands, made conspicuous by labeling, when DNA fragmented by endonucleases is subject to gel electrophoresis; corresponds to the nucleotide sequence. (05 Mar 2000) |
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| fish ladder | A series of descending weirs which carry water around a dam or waterfall to facilitate the upstream migration of fish. (09 Oct 1997) |
| ladder diagram |
Symbolic representation of a control scheme. The power lines form the two sides of a ladder like structure, with the program elements arranged to form the rungs. The basic program elements are contacts and coils as in electromechanical logic systems.
Ãâó: www.control.co.kr/dic/dic-l.htm
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| ladder d. |
a diagrammatic representation of the routes of cardiac conduction as determined by electrocardiographic recording, used in diagnosing arrhythmias. Vectors describing the origins and paths of individual normal or ectopic impulses as well as points of blocks to conduction are drawn across a series of horizontal lines representing the atria, atrioventricular node, ventricles, and sometimes additional regions of the conduction system. See illustration. Called also laddergram. Click here to view image■Ladder diagrams. (A), Sinus rhythm; (B), atrioventricular nodal reentrant tachycardia; AVN, atrioventricular node; BB, bundle branch.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| laddergram |
ladder diagram.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| ladder diagram |
The result of ladder programming used to control a PLC. The ladder language is modeled after relay wiring schematics. The fundamental theories behind ladder are consistent among all manufacturers. However, each PLC manufacturer generally has a proprietary ladder software package.
Ãâó: www.eatonelectrical.com/unsecure/html/101basics/Mo...
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| ladder | steps consisting of two parallel members connected by rungs |
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| ladder | a row of unravelled stitches |
| ladder | come unraveled or undone as if by snagging, of stockings |
| ladder | a fire engine carrying ladders |
| ladder | a chair backrest consisting of 2 uprights with connecting slats |
| ladder | a chair with a ladder-back |
| ladder | a chair with a ladder-back |
| ladder | (of hosiery) resistant to runs or (in Britain) ladders |
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