heliacal setting


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Related to heliacal setting: Heliacal rising

heliacal setting

[hi′lī·ə·kəl ′sed·iŋ]
(astronomy)
The setting of a celestial body at the same time or just after that of the sun.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.