标签:Definition

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Definition of Diachronic study

Diachronic study: A study done over the course of time. For example, alongitudinal study of children with Down syndrome (trisomy 21) might involve the study of100 children with this condition from birth to 10 years of age. Also called a lon...

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Definition of Diprosopus

Diprosopus: Two-faced conjoined twins (incompletely separated identical twins). The twins have almost complete fusion of their bodies with one set of limbs. Part or all of the face is duplicated. The condition usually results in stillbirth....

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Definition of DNA amplification

DNA amplification: The production of multiple copies of a sequence of DNA. Repeated copying of a piece of DNA. DNA amplification plays a role in cancer cells. A tumor cell amplifies, or copies, DNA segments as a result of cell signals and s...

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Definition of Marmoreal

Marmoreal: Resembling marble. For example, the bone in osteoporosis appears marmoreal. From the Latin noun "marmor" meaning "marble."...

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Definition of Med1 DNA repair gene

Med1 DNA repair gene: A gene that codes for one of the key enzymes involved in repairing DNA. The DNA in genes is constantly mutating and being repaired. This repair process is controlled by special genes. A mutation in a DNA repair gene su...

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Definition of Melan (prefix)

Melan- (prefix): Prefix meaning dark or black. It comes from the Greek "melas", black. Examples of terms containing melan- include melancholia, melanin, melanocytes, melanoma and melena....

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Definition of Menstrual synchronization

Menstrual synchronization: A phenomenon that occurs when two or more menstruating women live or otherwise spend a lot of time together, in which the menstrual cycles of the women gradually become synchronized. The mechanism and reason for t...

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