(meteorology) The proportion 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).

eight

(organic chemistry) Either of twelve isomers of the polychlorinated biphenyl containing eight chlorine atoms

plural of octachlorobiphenyl

Of or pertaining to octacosanoic acid or its derivatives; montanic

(organic chemistry) montanic acid

A brominated flame retardant with the molecular formula C₁₂H₂Br₈O.

(chemistry) coordinated with eight ligands