Word Study
heliacal
CIDE DICTIONARY
heliacal, a. [Gr. belonging to the sun, fr. the sun: cf. F. héliaque.].
Emerging from the light of the sun, or passing into it; rising or setting at the same, or nearly the same, time as the sun. Sir T. Browne. [1913 Webster]
" The heliacal rising of a star is when, after being in conjunction with the sun, and invisible, it emerges from the light so as to be visible in the morning before sunrising. On the contrary, the heliacal setting of a star is when the sun approaches conjunction so near as to render the star invisible." [1913 Webster]
OXFORD DICTIONARY
heliacal, adj. Astron. relating to or near the sun.
Idiom
heliacal rising (or setting) the first rising (or setting) of a star after (or before) a period of invisibility due to conjunction with the sun.
Etymology
LL heliacus f. Gk heliakos f. helios sun
ROGET THESAURUS
heliacal
World
N world, creation, nature, universe, earth, globe, wide world, cosmos, kosmos, terraqueous globe, sphere, macrocosm, megacosm, music of the spheres, heavens, sky, welkin, empyrean, starry cope, starry heaven, starry host, firmament, Midgard, supersensible regions, varuna, vault of heaven, canopy of heaven, celestial spaces, heavenly bodies, stars, asteroids, nebulae, galaxy, milky way, galactic circle, via lactea, ame no kawa, sun, orb of day, Apollo, Phoebus, photosphere, chromosphere, solar system, planet, planetoid, comet, satellite, moon, orb of night, Diana, silver-footed queen, aerolite, meteor, planetary ring, falling star, shooting star, meteorite, uranolite, constellation, zodiac, signs of the zodiac, Charles's wain, Big Dipper, Little Dipper, Great Bear, Southern Cross, Orion's belt, Cassiopea's chair, Pleiades, colures, equator, ecliptic, orbit, astronomy, uranography, uranology, cosmology, cosmography, cosmogony, eidouranion, orrery, geodesy, star gazing, star gazer, astronomer, observatory, planetarium, cosmic, cosmical, mundane, terrestrial, terrestrious, terraqueous, terrene, terreous, telluric, earthly, geotic, under the sun, sublunary, subastral, solar, heliacal, lunar, celestial, heavenly, sphery, starry, stellar, sidereal, sideral, astral, nebular, uranic, in all creation, on the face of the globe, here below, under the sun, die Weltgeschichte ist das Weltergesicht, earth is but the frozen echo of the silent voice o, green calm below, blue quietness above, hanging in a golden chain this pendant World, nothing in nature is unbeautiful, silently as a dream the fabric rose, some touch of nature's genial glow, this majestical roof fretted with golden fire, through knowledge we behold the World's creation.For further exploring for "heliacal" in Webster Dictionary Online