dawnlight

dawn +‎ light

dawnlight (uncountable)

1. The light of dawn.
   • 1965, Frank Herbert, “Book Three: The Prophet”, in Dune‎ (Science Fiction), New York: Ace Books, →OCLC, page 402‎:

     It came from the southeast, a distant hissing, a sandwhisper. Presently he saw the faraway outline of the creature’s track against the dawnlight and realized he had never before seen a maker this large, never heard of one this size. It appeared to be more than half a league long, and the rise of the sandwave at its cresting head was like the approach of a mountain.

• lightwand