eight

(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).

plural of octa

plural of octacosane

(organic chemistry) Any of very many isomers of the aliphatic hydrocarbon having 28 carbon atoms, but especially n-octacosane CH₃(CH₂)₂₆CH₃

A brominated flame retardant with the molecular formula C₁₂H₂Br₈O.

Of or pertaining to octacosanoic acid or its derivatives; montanic

(organic chemistry) montanic acid

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

plural of octachlorobiphenyl