Challenge: Sidereal
sidereal \sy-DEER-ee-uhl\, adjective:
measured or determined by the daily motion of the stars; of or having to do with the stars or constellations
by 1634, "of or pertaining to the stars," earlier sideral (1594), from French sidereal (16th century), from Latin sidereus "starry, astral," from sidus "star, constellation," probably from Proto Indo-European base *sweid- "to shine"
measured or determined by the daily motion of the stars; of or having to do with the stars or constellations
by 1634, "of or pertaining to the stars," earlier sideral (1594), from French sidereal (16th century), from Latin sidereus "starry, astral," from sidus "star, constellation," probably from Proto Indo-European base *sweid- "to shine"