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something done or occurring more than once, particularly over and over.
long terminal r's identical nucleotide sequences occurring at each end of a proviral genome or a transposon and believed to be essential for integration of the molecule into host DNA.
tandem repeat appearance of two or more identicle segments close to each other within a strand of DNA.


something done or occurring more than once, particularly over and over.


(rep.) (rē-pēt')
Prescription directions for the pharmacist.
[L. repetatur, let it be repeated]

Patient discussion about repeat

Q. Now my question is: what kind of repetitive symptoms should I look for? I read the previous question about the early autism symptoms of a child. It is very beneficial. Now my question is: what kind of repetitive symptoms should I look for?

A. It depends upon your child’s health. Repetitive symptoms will vary from child to child but they will begin to show up at a very young age. Look for things such as stacking of items or lining items up compulsively. They may also have repetitive body movements such as hand flapping or body rocking. In some cases, the child may even injure themselves on a regular basis such as by biting their skin. As with most things, each individual child will display repetitive symptoms in their own way.

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References in periodicals archive ?
Because the unusual spacing evident in quasicrystals cannot result from a simply repeating unit cell, researchers turned to alternative structural models.
Repeating Arms Corporation and not the Winchester name itself.
Until recently, however, materials scientists could not explain how the atoms of these quasicrystals could assemble themselves into such a complex arrangement rather than the regularly repeating pattern of a crystal.
Once past the initial shock of discovering a new mechanism behind inherited diseases, researchers began delving into how repeating DNA wreaks its havoc.
Instead of repeating the eighth-grade, they can come to our school and finish up the requirements for eighth-grade, start ninth-grade requirements and transfer to high school.
But as the saying goes, the only thing more difficult than winning the championship is repeating.
But the pattern's unusual fivefold symmetry suggested that the atoms could not lie in one of the orderly arrangements of repeating units, or building blocks, conventionally assigned to crystals.
The big value of Repeating Groups is ease and speed of implementation for complex data structures," said Kevin Lupowitz, senior vice president, product development of VIE Systems Inc.
Nudging a chaotic system so that its erratic behavior settles into a regularly repeating pattern requires a similar approach (SN: 1/26/91, p.
The circuit shows how the addition of a small chaotic component to a smoothly varying, regularly repeating input signal used to drive two separate oscillators helps the signal emanating from the oscillators fall into step.
The duplications disrupt the gene's message, just as repeating words randomly throughout a sentence would make it unreadable.