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rachitis    
n. 佝偻病,脊柱炎

佝偻病,脊柱炎

rachitis
n 1: inflammation of the vertebral column
2: childhood disease caused by deficiency of vitamin D and
sunlight associated with impaired metabolism of calcium and
phosphorus [synonym: {rickets}, {rachitis}]

Rachitis \Ra*chi"tis\ (r[.a]*k[imac]"t[i^]s), n. [NL., fr. Gr.
"rachi^tis (sc. nosos), fr. "ra`chis, -ios, the spine.]
[Written also {rhachitis}.]
1. (Med.) Literally, inflammation of the spine, but commonly
applied to the rickets. See {Rickets}.
[1913 Webster]

2. (Bot.) A disease which produces abortion in the fruit or
seeds. --Henslow.
[1913 Webster]


Rickets \Rick"ets\, n. pl. [Of uncertain origin; but cf. AS.
wrigian to bend, D. wrikken to shake, E. wriggle.] (Med.)
A disease which affects children, and which is characterized
by a bulky head, crooked spine and limbs, depressed ribs,
enlarged and spongy articular epiphyses, tumid abdomen, and
short stature, together with clear and often premature mental
faculties. The essential cause of the disease appears to be
the nondeposition of earthy salts in the osteoid tissues.
Children afflicted with this malady stand and walk
unsteadily. Called also {rachitis}.
[1913 Webster]

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  • A - Wikipedia
    Pronunciation of the name of the letter a in European languages a and aː can differ phonetically between [a], [ä], [æ] and [ɑ] depending on the language The earliest known ancestor of A is aleph —the first letter of the Phoenician alphabet [4] —where it represented a glottal stop [ʔ], as Phoenician only used consonantal letters
  • The Letter A | Alphabet A-Z | Jack Hartmann Alphabet Song
    Learn to recognize the upper and lowercase letter A, how to write the letter A and the short and long vowel sounds that letter A makes This series incorporates the modalities of visual,
  • A Definition Meaning | Dictionary. com
    any spoken sound represented by the letter A or a, as in bake, hat, father, or small something having the shape of an A a written or printed representation of the letter A or a a device, as a printer's type, for reproducing the letter A or a not know from A to B, to know nothing; be ignorant
  • A Definition Meaning - Merriam-Webster
    Before a consonant sound represented by a vowel letter a is usual but an also occurs though less frequently now than formerly Before unstressed or weakly stressed syllables with initial h both a and an are used in writing
  • A Definition Meaning | Britannica Dictionary
    A is used before a consonant sound An is used before a vowel sound Note that when a word begins with a vowel letter but is pronounced with a consonant sound, a is used When an abbreviation begins with a consonant letter but is pronounced with a vowel sound, an is used
  • Letter A Song | Letter Recognition and Phonics with Gracies Corner . . .
    First in the alphabet, let’s learn it today A is for axe and astronaut Alligator and airplane Sit back, let me explain What sound does the letter A make?
  • Type A with Accent À, Á, Â, Ã, Ä, Å or à, á, â, ã, ä, å
    Portuguese uses á, â, and ã The tilde (ã) indicates nasalization, while acute and circumflex accents affect stress and vowel quality Spanish uses á to mark stress on a syllable, helping distinguish pronunciation and meaning in words French commonly uses à and â
  • The Letter “A” in English: Meaning, History Use - Vedantu
    Today, we’re opening the amazing world of English by learning all about its very first letter: “A” If you have ever wondered why “A” is on top of the alphabet chart, why it looks the way it does, or why so many words begin with it, get ready for a fun GK adventure
  • A to Z Alphabets for Kids in English | ABC Alphabets with Pictures
    In this article, we will learn the A to Z alphabets for kids in English with pictures to make learning joyful and effective The first letter of the alphabet is often used for words like apple and ant The second letter, used in words like ball and bat The third letter makes a “k” or “s” sound in words like cat and city
  • The indefinite article: a and an | LearnEnglish
    Learn how to use the indefinite article a (or an) and do the exercises to practise using it





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