Merriam-Webster Collegiate Dictionary - rickets
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Rickets
rickets
noun plural but singular in construction Etymology: origin unknown Date: 1634 a deficiency disease that affects the young during the period of skeletal growth, is characterized especially by soft and deformed bones, and is caused by failure to assimilate and use calcium and phosphorus normally due to inadequate sunlight or vitamin D
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1.
n. (treated as sing. or pl.) a disease of children with softening of the bones (esp. the spine) and bow-legs, caused by a deficiency of vitamin D. Etymology: 17th c.: orig. uncert., but assoc. by medical writers with Gk rhakhitis RACHITIS ...Толковый словарь английского языка Oxford English Reference
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4.
Rickets is a disease that children can get when their food does not contain enough Vitamin D. It makes their bones soft and causes their liver and spleen to become too large. N-UNCOUNT ...Collins COBUILD Advanced Learner's English Dictionary
5.
~ n a disease that children get in which their bones become soft and bent, caused by a lack of vitamin D rickety ~ adj a rickety piece of furniture or part of a building is in such bad condition that it looks as if it will break if you use it (an old rickety wooden chair) ...Longman Dictionary of Contemporary English
6.
- 1634, of uncertain origin. Originally a local name for the disease in Dorset and Somerset, England. The Mod.L. name for the disease, rachitis, cames from Late Gk. rhachitis "inflammation of the spine," from Gk. rhakhis "spine," but this was chosen by Whistler for resemblance to rickets. Rickety "liable to fall down" (1685) is from rickets via notion of "weak, unhealthy," but has rarely been used in its literal sense. The organism rickettsia was named 1919 for the man who first identified it, H.T. Ricketts. ...Английский Этимологический словарь
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