Antonym: acceleration. Similar words: retardant, retaliation, retard, retarded, interpretation, predation, gradation, emendation. Meaning: [‚rɪːtɑr'deɪʃn /-tɑː'd-] 
n. 1. a decrease in rate of change 2. the extent to which something is delayed or held back 3. any agent that retards or delays or hinders 4. lack of normal development of intellectual capacities 5. the act of slowing down or falling behind.
n. 1. a decrease in rate of change 2. the extent to which something is delayed or held back 3. any agent that retards or delays or hinders 4. lack of normal development of intellectual capacities 5. the act of slowing down or falling behind. 
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31. Lead is a multitargeted toxicant on organisms, causing effects in mental retardation, low function, hypertension, nephropathy.
32. The temperament - responsive teaching effectively improved the mathematical achievement of the students mild mental retardation.
33. And designed shaping circuit composed of retardation voltage comparison after comparing characteristics of simple voltage comparison and retardation voltage comparison.
34. Down Syndrome syndrome is the most common genetic cause of metal retardation mental retardation.
35. Laurence-Moon syndrome is a rare hereditary condition associated with retinitis pigmentosa, spastic paraplegia, hypogonadism and mental retardation.
36. CFC syndrome and CS can be distinguished from NS by the presence of ectodermal abnormalities, mental retardation and a lack of familial cases.
37. Conclusion The results of this study suggest that NMD is characterized by mental retardation, epilepsy and hemiparesis. Cranial MRI is the best diagnostic method.
38. Conclusion: The mental retardation is correlative with the chromosome aberration and the fragile site expression rate.
39. Studies of family, twin and Foster child reveal that genetic factors play an important role in the etiological complex of mental retardation.
40. His daughter Laura from first marriage was institutionalized because of mental retardation.
41. The effect of profusion on reducing the core melt - retardation of flux cored wire is studied.
42. For most, the worst symptom is a cold sore, but in some individuals, the virus causes inflammation of the brain that can lead to mental retardation, epilepsy, or death.
43. They are associated with physical problems, microcephaly and mental retardation.
44. The retardation force of slush drag is proportional to fluid depth, its density, and the square of the forward ground speed velocity.
45. Results In Ankang experimental station, these mental retardation population caused by non-specific mental retardation and endemic sub-clinical cretinism, have heritability of 86.
46. Objective To show the impaction of chromosomal abnormalities on abortion, mental retardation, primary amenorrhea by chromosome exam.
47. According to the classification of F. L. Browne, the flame retardation mechanism of wood materials is expounded. Sentencedict.com
48. Laser frequency splitting technology can be used to measure phase retardation of a wave-plate.
49. The experiment uses both antibacterial reagent chitin and flame retardation potassium fluotitanate in the wool flame retardent finishing.
50. Results:The data showed that patients with severe PIH were easy to suffer from abruptio, placentae intrauterine growth retardation(IUGR), fetal distress and acute left heart failure.
51. Low levels of copper have been associated with mental retardation, depigmentation, anaemia, hypotonia and scorbutic changes in bone.
52. Special children, who are not able to communicate with normal people smoothly because of their dysaudia, vision disorder or mental retardation, are a particular group of the society.
53. Objective : To explore the correlativity between mental retardation, chromosome aberration rate and fragile site expression rate.
54. Placenta previa was see in 2 cases, cord around neck in 12, intrauterine growth retardation in 1, and hydatid mole in one.
55. Down syndrome is the most common genetic cause of mental retardation.
56. And voltage comparator with retardation has been chosen as the shaping circuit to minish undesired signal and to improve the sensitivity of circuit.
57. The majority of children with obvious mental deterioration, retardation. 3-4 years of age often infantile spasms stopped automatically, but half of the body are transformed into grand mal.
58. The results show that it has much higher flame retardation effect than the mixed flame retardant of tribromophenol and antimonic oxide.
59. Survey On Physical Function Developmental Level Of Students With Mental Retardation In beijing.
60. Objective To investigate the characteristics of cognitive evoked potentials in mental retardation and idiot savant.
More similar words: retardant, retaliation, retard, retarded, interpretation, predation, gradation, emendation, validation, foundation, vegetation, commendation, trepidation, degradation, dilapidation, intimidation, accommodation, starvation, consolidation, recommendation, foundation stone, secretary, international relations, demilitarization, nationalization, rationalization, multinational corporation, undersecretary, secretary of state, reaction formation.