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octaeterid|ˌɒktəɪˈtɪərɪd|
Also in Gr. form octaeˈteris.
[ad. Gr. ὀκταετηρίς, -ιδ-, f. ὀκτα- octa- + ἔτος year. In F. octaétéride (1732 in Dict. Trévoux).]
In the ancient Greek calendar, a period of eight years, in the course of which three months of 30 days each were intercalated so as to bring the year of 12 lunar months into accord with the solar year. So octaeteric |-ɪˈtɛrɪk| a., of or belonging to this period.
a1727Newton Chronol. Amended (1728) i. 75. 1727–41 Chambers Cycl., Octaeterides, in chronology, etc. the space, or duration of eight years. 1753― Cycl. Supp., Octaeteris,..in antiquity, a cycle, or term, of eight years, at the end of which three entire lunar months were added. 1846Grote Greece II. ii. ii. 353 note, The properties of the octaeteric or enneaeteric period. 1862Sir G. C. Lewis Astron. Ancients 38 The octaëteric cycle, attributed to Cleostratus. Ibid. 9 Three months of thirty days apiece were intercalated in each of the two first octaeterids. 1899W. W. Fowler Roman Festivals 2 In the octaeteris or 8-year cycle there were 99 lunar months. |