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retardation |
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retardation: see mental retardation mental retardation, below average level of intellectual functioning, usually defined by an IQ of below 70 to 75, combined with limitations in the skills necessary for daily living. ..... Click the link for more information. . retardation [‚rē‚tär′dā·shən] (medicine) Slow mental or physical functioning. (navigation) The amount of delay in time or phase angle introduced by the resistivity of the surface over which the radio wave in radio navigation is passing. (oceanography) The amount of time by which corresponding tidal phases grow later day by day, averaging approximately 50 minutes. (optics) In interference microscopy, the difference in optical path between the light passing through the specimen and the light bypassing the specimen. Also known as optical-path difference. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The relative contribution of prematurity and fetal growth retardation to low birth weight in developing and developed societies. The work begins with a valuable discussion of the relationship between maternal nutrition and the weight of an infant at birth, which necessarily involves questions of prematurity and fetal growth retardation. The meta-analysis suggests that confounding facts -- such as other drugs, alcohol and smoking -- may account for the fetal growth retardation or |
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