an intensely radioactive metallic element that occurs in minute amounts in uranium ores
<noun.substance>
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
<noun.person>
(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
<noun.location> one hour of right ascension equals fifteen degrees
Ra \Ra\ (r[aum]), n. A roe; a deer. [Obs.] --Chaucer.
The print is actually at the RA but as part of the great Mantegna exhibition: the National Gallery in Washington bought it from Hill-Stone last autumn and has loaned it to the show. Print dealers have ridden the recession better than most.
The result is that what you are shown at the RA is just the tip of a fascinating but nearly incomprehensible iceberg. The first architectural exhibit to catch the eye is what looks like a peepshow on the left hand wall of the Central Hall.