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单词 heliacal
释义

WordReference Random House Unabridged Dictionary of American English © 2024
he•li•a•cal  (hi līə kəl),USA pronunciation adj. [Astron.]
  1. Astronomypertaining to or occurring near the sun, esp. applied to such risings and settings of a star as are most nearly coincident with those of the sun while yet visible.
Also, he•li•ac (hēlē ak′).USA pronunciation 
  • Greek hēliakós; see heli-1, -ac) + -al1
  • Late Latin hēliac(us) (
  • 1600–10
he•lia•cal•ly, adv. 

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