| triple X syndrome | <syndrome> In principle, the phenotypic features characteristic of trisomy of the X chromosome. Original observations (made in mental institutions) were seriously biased and the phenotypic changes spurious; now, even the remaining claim, that there is mild mental retardation, is suspect. The outstanding feature of the syndrome is the occurence of twin Barr bodies in a typical cell. (05 Mar 2000) |
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| Flemming's triple stain | <technique> A stain comprised of safranin, methyl violet, and orange G. (05 Mar 2000) |