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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 | 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
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    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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