You can find definition of ras below. Words can have several meanings depending on the context. Their meaning may vary depending on where they are used. Please choose approriate definition according to part of speech and context. We have found 4 different definitions of ras. ras is a 3 letter word. It starts with r and ends with s.
the network in the reticular formation that serves an alerting or arousal function
an intensely radioactive metallic element that occurs in minute amounts in uranium ores
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
(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