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ra    音標拼音: [r'ɑ]
n. [埃及神話] 太陽神

[埃及神話] 太陽神

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}]



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  • Rheumatoid arthritis - Symptoms and causes - Mayo Clinic
    Rheumatoid arthritis can cause joint pain and swelling As the tissue that lines the joints, called synovial membrane, becomes inflamed and gets thicker, fluid builds up As a result, joints can bend out of shape, called deformed
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    Rheumatoid arthritis (RA) is a chronic (ongoing) autoimmune disease that causes pain, swelling and stiffness in the lining of your joints (synovium) It most commonly affects the joints in your fingers, hands, wrists, knees, ankles, feet and toes
  • Rheumatoid arthritis - Wikipedia
    Risk factors RA is a systemic (whole body) autoimmune disease Certain genetic and environmental factors affect the risk of RA
  • Rheumatoid Arthritis: Causes, Symptoms, Treatments and More
    Learn more about RA and how to treat it Updated Oct, 15, 2021 Rheumatoid arthritis (RA) causes joint inflammation and pain It happens when the immune system doesn’t work properly and attacks the lining of the joints, called the synovium
  • Rheumatoid Arthritis | Arthritis | CDC
    Rheumatoid arthritis (RA) causes pain, swelling, and stiffness in the joints There’s no cure for RA, but you can manage and treat it with medicines and lifestyle changes It’s best to diagnose and treat RA early to avoid joint damage and worsening symptoms and complications
  • Rheumatoid Arthritis: Signs, Causes, Treatments, and Care
    Rheumatoid arthritis (RA) is an autoimmune arthritis where your body’s immune system attacks its own tissue, including joints and internal organs, causing pain and swelling
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    This condition is called Rheumatoid Arthritis (RA), a chronic autoimmune disease that affects far more than just the joints—it can alter lives, reshape identities, and demand resilience in the face of constant challenges
  • Rheumatoid Arthritis | RA | MedlinePlus
    What is rheumatoid arthritis? Rheumatoid arthritis (RA) is a form of arthritis that causes pain, swelling, and stiffness in your joints RA is an autoimmune disease Although it is most common in the wrist and fingers, this disease can cause your immune system to attack any joint tissue
  • RA - What does RA stand for? The Free Dictionary
    Looking for online definition of RA or what RA stands for? RA is listed in the World's most authoritative dictionary of abbreviations and acronyms
  • Home - SetPoint Medical
    The SetPoint System is clinically proven to effectively treat RA for adults with moderately to severely active disease and inadequate response or intolerance to one or more biologics or targeted synthetic drugs





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