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ra    音标拼音: [r'ɑ]
n. [埃及神话] 太阳神

[埃及神话] 太阳神

Ra
n 1: an intensely radioactive metallic element that occurs in
minute amounts in uranium ores [synonym: {radium}, {Ra},
{atomic number 88}]
2: ancient Egyptian sun god with the head of a hawk; a universal
creator; he merged with the god Amen as Amen-Ra to become the
king of the gods [synonym: {Ra}, {Re}]
3: (astronomy) the equatorial coordinate specifying the angle,
measured eastward along the celestial equator, from the
vernal equinox to the intersection of the hour circle that
passes through an object in the sky; usually expressed in
hours and minutes and seconds; used with declination to
specify positions on the celestial sphere; "one hour of right
ascension equals fifteen degrees" [synonym: {right ascension},
{RA}, {celestial longitude}]

Ra \Ra\ (r[aum]), n.
A roe; a deer. [Obs.] --Chaucer.
[1913 Webster]


Ra- \Ra-\
A prefix, from the Latin re and ad combined, coming to us
through the French and Italian. See {Re-}, and {Ad-}.
[1913 Webster]

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  • Rheumatoid arthritis - Symptoms and causes - Mayo Clinic
    Rheumatoid arthritis is an ongoing, called chronic, condition that causes pain, swelling and irritation, called inflammation, in the joints But it also can damage other parts of the body These may include the skin, eyes, lungs, heart and blood vessels Rheumatoid arthritis happens when the immune system attacks its own body's tissues by mistake This is called an autoimmune condition
  • Rheumatoid arthritis - Diagnosis and treatment - Mayo Clinic
    Diagnosis Rheumatoid arthritis can be hard to diagnose in its early stages That's because the early symptoms can be like those of other common conditions During the physical exam, your healthcare professional checks your joints for swelling, redness and warmth Your healthcare professional also may check your reflexes and muscle strength
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    Rheumatoid arthritis is an autoimmune disease that affects multiple joints, resulting in pain, swelling, and stiffness Tiredness and fever may also be present
  • Rheumatoid Arthritis: Diagnosis, Treatment, and Steps to Take
    Rheumatoid arthritis is an autoimmune disease that affects multiple joints, resulting in pain, swelling, and stiffness Tiredness and fever may also be present
  • Study Identifies Subtypes of Inflammation in People with Rheumatoid . . .
    Rheumatoid arthritis (RA) is an autoimmune disease that causes joint inflammation, pain, and stiffness There are several treatment options to control inflammation, but response to therapy varies and some people with RA never reach remission, suggesting there may be different drivers of inflammation
  • Radium ra 223 dichloride (intravenous route) - Mayo Clinic
    Radium Ra 223 dichloride injection is used to treat men with castration-resistant (resistant to medical or surgical treatments to lower testosterone) prostate cancer that has spread to the bones but not to other organs It is a radiopharmaceutical agent Radiopharmaceuticals are radioactive agents that are used to find and treat certain diseases
  • Osteoarthritis vs. rheumatoid arthritis - Mayo Clinic
    Osteoarthritis, the most common form of arthritis, involves the wearing away of the cartilage that caps the bones in your joints Rheumatoid arthritis is a disease in which the immune system attacks the joints, beginning with the lining of joints There is a problem with information submitted for
  • Radiation therapy - Mayo Clinic
    Radiation therapy can be given inside or outside of your body The most common kind is external beam radiation therapy This treatment uses a large machine called a linear accelerator High-energy beams are aimed from the machine to a precise point on your body Radiation treatment that goes inside the body is called brachytherapy (brak-e-THER-uh-pee) Brachytherapy also is a common cancer
  • Arthritis - Diagnosis and treatment - Mayo Clinic
    Diagnosis During the physical exam, doctors check your joints for swelling, redness and warmth They'll also want to see how well you can move your joints Laboratory tests The analysis of different types of body fluids can help pinpoint the type of arthritis you may have Fluids commonly analyzed include blood, urine and joint fluid To obtain a sample of joint fluid, doctors cleanse and numb
  • Juvenile Idiopathic Arthritis Symptoms, Types, Causes | NIAMS
    Juvenile arthritis describes arthritis in children Arthritis is caused by inflammation of the joints Find out all you need to know about juvenile arthritis





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