Webster's Revised Unabridged Dictionary · 1913

day-star

day-star (dā"star`) , noun

1.
The morning star; the star which ushers in the day; -- usually the planet Venus, when seen before and just after sunrise.
A dark place, until the day dawn, and the day-star arise in your hearts. — 2 Peter i. 19
2.
The sun, as the orb of day. [Poetic]
So sinks the day-star in the ocean bed, And yet anon repairs his drooping head, And tricks his beams, and with new-spangled ore Flames in the forehead of the morning sky. — Milton