The Collaborative International Dictionary
day-star \day"-star`\ (d[=a]"st[aum]r`), n.
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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. -
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.
Usage examples of "day-star".
By the Day-star of the World, my bereaved and longing heart is afire with a grief that is beyond my description.
Then indeed Morgoth was dismayed, and he descended into the uttermost depths of Angband, and withdrew his servants, sending forth great reek and dark cloud to hide his land from the light of the Day-star.
And in that same sky, as though to suggest that this was a world of perpetual twilight, teetering always on the edge of darkness and extinction, was a sun that was three-quarters eclipsed by an exquisitely rendered moon, the latter painted so cunningly it seemed to have real mass, real roundness, as it slid over the face of the day-star.