heliacal
he·lia·cal
adjective
1.
pertaining to or near the sun; especially the first rising of a star after and last setting before its invisibility owing to its conjunction with the sun
- “the heliacal rising of the Dog Star”
- “the heliacal or Sothic year is determined by the heliacal rising of Sothis (the Egyptian name for the Dog Star)”
Origin
From Ancient Greek ἡλιακός (hēliakós, “of the sun”) + -al. Appears in English first in the 16th century.
Related words
Pertaining to
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.