drift

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drift

 [drift]
1. slow movement away from the normal or original position.
2. a chance variation, as in gene frequency from one generation to another; the smaller the population, the greater are the random variations.
antigenic drift relatively minor changes in the antigenic structure of a virus strain, probably resulting from natural selection of variants circulating among an immune or partially immune population. See also antigenic shift.
ulnar drift ulnar deviation.

drift

(drift),
1. A gradual movement, as from an original position.
2. A gradual change in the value of a random variable over time as a result of various factors, some random and some systematic effects of trend, manipulation, etc.

drift

(drift)
1. slow movement away from the normal or original position.
2. a chance variation, as in gene frequency between populations; the smaller the population, the greater are the chance random variations.

radial drift  see under deviation.
ulnar drift  see under deviation.

drift

Etymology: AS, drifan, to move forward
a gradual movement away from the original position. See also antigenic drift, genetic drift.

drift

Orthopedics See Pronator drift Virology Antigenic drift, see there.

drift

(drift)
1. A gradual movement, as from an original position.
2. A gradual change in the value of a random variable over time as a result of various factors, some random and some systematic effects of trend or manipulation.

drift

see RANDOM GENETIC DRIFT.

drift

(drift)
In dentistry, movement of teeth usually medially due to loss of adjacent teeth or wear of proximal surfaces.
Synonym(s): mesial drift, migrating teeth.

drift,

drift

chance variation; in genetics, the random changes in gene frequencies in a population.

antigenic drift
see antigenic drift.
drift lambing
a strategy in which ewes which have lambed are periodically removed from a flock of lambing ewes by moving the unlambed ewes on to the next paddock or field.
References in classic literature ?
It could not have been more than a few seconds that I lay senseless there upon the northern ice, while all that was dearest to me drifted farther from my reach in the clutches of that black fiend, for when I opened my eyes Thurid and Matai Shang yet battled at the ladder's top, and the flier drifted but a hundred yards farther to the south--but the end of the trailing rope was now a good thirty feet above the ground.
Should Matai Shang die before I reached the deck my chances of ever reaching it would be slender indeed, for the black dator need but cut the rope above me to be freed from me forever, for the vessel had drifted across the brink of a chasm into whose yawning depths my body would drop to be crushed to a shapeless pulp should Thurid reach the rope now.
Once or twice he saw guns and soldiers, and was reminded of the stir of military preparations he had witnessed on the Bank Holiday in England; but there was nothing to tell him that these military preparations were abnormal or to explain an occasional faint irregular firing Of guns that drifted up to him.
It drifted about till it went to pieces, and often Starkey came to the shore of the lagoon, and with many bitter feelings watched the bird sitting on his hat.
Rokoff, on the other hand, had used little or no intelligence in his flight along the Ugambi, so that more often than not his craft had drifted in the slow-going eddies, for he habitually hugged the bank farthest from that along which the hideous horde pursued and menaced him.
And toward that bank, which was the north bank, we drifted rapidly, at the same time going down-stream.
This led to more talking, and Johnny drifted out of the conversation to wait on other customers.
But more terrors still he had to endure until at last the ship drifted homeward--
The flat drifted under the bridge and then promptly sank in midstream.
have you drifted into an honest employment at last?
The boat drifted with the stream, little Gerda sat quite still without shoes, for they were swimming behind the boat, but she could not reach them, because the boat went much faster than they did.
And, so nicely had he made his calculation, we drifted fairly down upon it, so that nothing remained to do but hook the tackles to either end and hoist it aboard.