(n): any network of neurons or nuclei that function together to perform some function in the body
(n): an intensely radioactive metallic element that occurs in minute amounts in uranium ores
(n): any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
(n): 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
(n): a deity worshipped by the ancient Egyptians
(n): (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
(n): the angular separation between two objects as perceived by an observer
