One of the mysteries of the English language finally explained.
Of or relating to the stars; starry; = "sidereal".
Mid 16th century; earliest use found in George Joye (1490x95–1553), evangelical author. From classical Latin sīderālis of or concerned with the stars or constellations from sīder-, sīdus celestial object, star, planet, constellation, comet (of unknown origin) + -ālis.
In this article we explore how to impress employers with a spot-on CV.