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chain

 [chān]
a collection of objects linked together in linear fashion, or end to end, as the assemblage of atoms or radicals in a chemical compound, or an assemblage of individual bacterial cells.
branched chain an open chain of atoms, usually carbon, with one or more side chains attached to it.
closed chain several atoms linked together so as to form a ring, which may be saturated, as in cyclopentane, or aromatic, as in benzene.
H chain (heavy chain) any of the large polypeptide chains of five classes that, paired with the L or light chains, make up the antibody molecule of an immunoglobulin; heavy chains bear the antigenic determinants that differentiate the classes of immunoglobulins. See also heavy chain disease.
J chain a polypeptide occurring in polymeric IgM and IgA molecules.
L chain (light chain) either of the two small polypeptide chains (molecular weight 22,000) that, when linked to H or heavy chains by disulfide bonds, make up the antibody molecule of an immunoglobulin monomer; they are of two types, kappa and lambda, which are unrelated to immunoglobulin class differences.
open chain a series of atoms united in a straight line; components of this series are related to methane.
chain reaction a chemical reaction that is self-propagating; each time a free radical is destroyed a new one is formed.
side chain a group of atoms attached to a larger chain or to a ring.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

chain

(chān),
1. chemistry a series of atoms held together by one or more covalent bonds.
See also: sympathetic trunk.
2. bacteriology a linear arrangement of living cells that have divided in one plane and remain attached to each other.
See also: sympathetic trunk.
3. A series of reactions.
See also: sympathetic trunk.
4. In anatomy, a linked series of structures, for example, ossicular chain, chain ganglia , under ganglion.
See also: sympathetic trunk.
[L. catena]
Farlex Partner Medical Dictionary © Farlex 2012

CHAIN

Abbreviation for:
Contact, Help, Advice, and Information Network (Medspeak-UK)
Contrast Hierarchical Alignment and Interaction Network
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

chain

(chān)
1. chemistry A series of atoms held together by one or more covalent bonds.
2. bacteriology A linear arrangement of living cells that have divided in one plane and remain attached to each other.
3. A series of reactions.
4. anatomy A linked series of structures, e.g., ossicular chain, chain ganglia.
See also: sympathetic trunk
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

chain

(chān)
bacteriology a linear arrangement of living cells that have divided in one plane and remain attached to each other.
Medical Dictionary for the Dental Professions © Farlex 2012
References in classic literature ?
At length the flames, suddenly increasing in virulence, forced the jester to climb higher up the chain, to be out of their reach; and, as he made this movement, the crowd again sank, for a brief instant, into silence.
As he talked Carthoris had been working at the lock which held my fetters, and now, with an exclamation of pleasure, he dropped the end of the chain to the floor, and I stood up once more, freed from the galling irons I had chafed in for almost a year.
What your worship may do, and fairly do, is to change this service and tribute as regards the lady Dulcinea del Toboso for a certain quantity of ave-marias and credos which we will say for your worship's intention, and this is a condition that can be complied with by night as by day, running or resting, in peace or in war; but to imagine that we are going now to return to the flesh-pots of Egypt, I mean to take up our chain and set out for El Toboso, is to imagine that it is now night, though it is not yet ten in the morning, and to ask this of us is like asking pears of the elm tree."
From Sancho they took his coat, leaving him in his shirt-sleeves; and dividing among themselves the remaining spoils of the battle, they went each one his own way, more solicitous about keeping clear of the Holy Brotherhood they dreaded, than about burdening themselves with the chain, or going to present themselves before the lady Dulcinea del Toboso.
With that the bird let fall the gold chain, and it fell just round the man's neck, so that it fitted him exactly.
He went inside, and said, 'See, what a splendid bird that is; he has given me this beautiful gold chain, and looks so beautiful himself.'
"Del Mar was the limit himself," he told Johnny, who held Michael by the chain. "When he wired me to sell his dogs it meant he had a better turn, and here's only one dog to show for it, a damned thoroughbred at that.
In his wrath, Michael tried to bite the master-god, and was jerked away by the chain. When he strove to retaliate on Johnny, that imperturbable youth, with extended arm, merely lifted him into the air on his chain and strangled him.
Then there was the sleigh ride, during which she found her tongue and chattered like any magpie, and so ended that glorious Christmas Day; and many and many a night thereafter did Rebecca go to sleep with the precious coral chain under her pillow, one hand always upon it to be certain that it was safe.
After passing over the first chain of mountains we skirted a salt sea, upon whose bosom swam countless horrid things.
At the next halt Hooja the Sly One managed to find enough slack chain to permit him to worm himself back quite close to Dian.
Of the twelve prisoners who had been chained ahead of me each alternate one had been freed commencing with Dian.