Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun meteorology 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).
Etymologies
Sorry, no etymologies found.
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Examples
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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."
Wal-Mart bypasses federal regulators to ban controversial flame retardant 2011
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Take a gander at the specs, and you'll see why I like to call it the "octa" system:
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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.
Factors affecting surface ultraviolet radiation levels in the Arctic 2009
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Deca - and octa-brominated types of PBDEs are also produced outside of the United States (in China and Israel).
Public Health Statement for Polybrominated Diphenyl Ethers (PBDEs) 2008
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There are three commercial PBDE products (i.e., penta -, octa -, and decabromodiphenyl ethers).
Public Health Statement for Polybrominated Diphenyl Ethers (PBDEs) 2008
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Yes, there are health and environmental concerns over two other brominated fire retardants, "penta" and "octa," but their use was phased out in the U.S. several years ago.
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Among the PBDEs most widely used and most prevalent in animal tissues are the commercial mixtures: penta -, octa -, and deca-BDE.
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U.S. industries stopped producing octa-BDEs voluntarily in December of 2004, though there is no federal ban on use of existing stocks.
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I am quite sure that my colleauges and I read somewhere that the "thorpe" came from the governor of Georgia in the 17th c. and that the "octo" part was originally "octa" and had nothing to do with eight of anything.
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So a quick set-up with medium octa very close to the subject.
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