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D    音标拼音: [d'i]
n. 字母D

字母D

d
adj 1: denoting a quantity consisting of 500 items or units
[synonym: {five hundred}, {500}, {d}]
n 1: a fat-soluble vitamin that prevents rickets [synonym: {vitamin
D}, {calciferol}, {viosterol}, {ergocalciferol},
{cholecalciferol}, {D}]
2: the cardinal number that is the product of one hundred and
five [synonym: {five hundred}, {500}, {D}]
3: the 4th letter of the Roman alphabet [synonym: {D}, {d}]

Mute \Mute\, n.
1. One who does not speak, whether from physical inability,
unwillingness, or other cause. Specifically:
(a) One who, from deafness, either congenital or from
early life, is unable to use articulate language; a
deaf-mute.
(b) A person employed by undertakers at a funeral.
(c) A person whose part in a play does not require him to
speak.
(d) Among the Turks, an officer or attendant who is
selected for his place because he can not speak.
[1913 Webster]

2. (Phon.) A letter which represents no sound; a silent
letter; also, a close articulation; an element of speech
formed by a position of the mouth organs which stops the
passage of the breath; as, {p}, {b}, {d}, {k}, {t}.
[1913 Webster]

3. (Mus.) A little utensil made of brass, ivory, or other
material, so formed that it can be fixed in an erect
position on the bridge of a violin, or similar instrument,
in order to deaden or soften the tone.
[1913 Webster]


D \D\ (d[=e])
1. The fourth letter of the English alphabet, and a vocal
consonant. The English letter is from Latin, which is from
Greek, which took it from Ph[oe]nician, the probable
ultimate origin being Egyptian. It is related most nearly
to t and th; as, Eng. deep, G. tief; Eng. daughter, G.
tochter, Gr. qyga`thr, Skr. duhitr. See Guide to
Pronunciation, [root]178, 179, 229.
[1913 Webster]

2. (Mus.) The nominal of the second tone in the model major
scale (that in C), or of the fourth tone in the relative
minor scale of C (that in A minor), or of the key tone in
the relative minor of F.
[1913 Webster]

3. As a numeral D stands for 500. in this use it is not the
initial of any word, or even strictly a letter, but one
half of the sign ? (or ? ) the original Tuscan numeral for
1000.
[1913 Webster]

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  • D - Wikipedia
    D (minuscule: d) is the fourth letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other Western European languages and others worldwide
  • The Letter D | Alphabet A-Z | Jack Hartmann Lets Learn From A- Z . . .
    Learn how to form the upper and lowercase D with Jack Hartmann's catchy rhymes and alphabet song These rhymes are a wonderful mnemonic way to remember letter formation for the letter d
  • Vitamin D: Benefits, Sources, Deficiencies - Healthline
    You may be wondering about vitamin D benefits and how much you need Learn more about vitamin D and your health, as well as what happens when you get too much and how much vitamin D you need
  • Vitamin D Deficiency: Causes, Symptoms Health Risks - WebMD
    Vitamin D is essential for healthy bones, a lack of it can lead to health problems, including cardiovascular disease Know how to get plenty of vitamin D treat deficiency
  • What Happens to Your Body When You Take Vitamin D Regularly
    Learn how vitamin D benefits your body, and how to know if you're getting enough of this key nutrient or if you need more from sun exposure, your diet, or supplements
  • Vitamin D: Benefits, deficiency, sources, and dosage
    In this article, we look at the benefits of vitamin D, what happens to the body when people do not get enough, and how to boost vitamin D intake
  • Vitamin D | Linus Pauling Institute | Oregon State University
    (More information) Vitamin D can regulate cell differentiation and growth by binding to the vitamin D receptor found in most body cells Observational studies have reported associations between low sun exposure, poor vitamin D status, and increased risk of developing colorectal and breast cancer
  • Vitamin D - The Nutrition Source
    Few foods naturally contain vitamin D, though some foods are fortified with the vitamin For most people, the best way to get enough vitamin D is taking a supplement because it is hard to eat enough through food
  • Vitamin D - MedlinePlus
    Vitamin D helps your body absorb calcium You can get Vitamin D in three ways: through your skin, from your diet, and from supplements
  • Vitamin D - Mayo Clinic
    Vitamin D is a nutrient the body needs, along with calcium, to build bones and keep them healthy The body can absorb calcium only if it has enough vitamin D Calcium is a major part of bones





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