Acronychal

• (a.) Rising at sunset and setting at sunrise, as a star; -- opposed to cosmical.
Found on http://thinkexist.com/dictionary/meaning/acronychal/

acronychal

acronych, acronychal, acronyctous Happening in the evening or at night-fall, vespertine, as the acronychal rising or setting of a star. Sometimes this term is used as if `rising in the evening or at sunset and setting at sunrise”; but this is not correct. When the rising is acronychal, the setting is cosmical, and vice versa. (According to the Ox...
Found on http://www.wordinfo.info/words/index/info/view_unit/2372/5
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