Definition of "octa" [octa]

• The fraction of the sky that is obscured by clouds, in eighths (one octa means that one eighth of the sky is obscured, two octas that one quarter is obscured, and so on). (noun)

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• "About a dozen states have banned two of the three types of PBDEs used in consumer goods, known as "octa" and "penta.""
• "Take a gander at the specs, and you'll see why I like to call it the "octa" system:"
• "The sky is divided into eight sectors and the octa number, between zero and eight, is based on the number of observed sectors containing clouds."