| Barr body |
A highly condensed mass of chromatin found in the nuclei of normal females, but not in the nuclei of normal male cells. It represents a cytologically condensed and inactivated X chromosome.
Ãâó: www.modernhumanorigins.com/b.html
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| barrel chest |
the shape of the chest in some patients with COPD when air trapping causes overinflated lungs
Ãâó: members.tripod.com/noairtogo/gloss.htm
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| bar |
The sum of the fitnesses of the genotypes of a population weighted by their proportions; hence a weighted mean fitness.
Ãâó: helios.bto.ed.ac.uk/bto/glossary/lm.htm
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| Barrett's esophagus |
A change in the cells of the tissue that lines the bottom of the esophagus. The esophagus may become irritated when the contents of the stomach back up (reflux). Reflux that happens often over a period of time can lead to Barrett's esophagus.
Ãâó: www.bdid.com/termsb.htm
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| barbiturates |
Depressant drugs that produce relaxation and sleep. Sleeping pills such as pentobarbital and secobarbital are barbiturates.
Ãâó: science.education.nih.gov/supplements/nih2/addicti...
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