from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One eighth of the total area of the celestial dome; used as a measure of cloudiness (one okta means that one eighth of the sky is obscured, two oktas that one quarter is obscured, and so on).
From octa-. (Wiktionary)
They were, apparently, ready for seven but it was the surprise eighth baby in a near-historic litter that surprised everyone in a world where okta or okto has long been Greek for eight.