| heliac | (adjective) 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 | Synonyms: heliacal |
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| heliacal | (adjective) 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 | Synonyms: heliac |
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| helical | (adjective) in the shape of a coil | Synonyms: coiling, spiral, spiraling, spiralling, turbinate, volute, voluted, whorled |
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| heliocentric | (adjective) having the sun as the center | - |
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