macroturbulenceLarge-scale motions, at up to 50 km/s, in a stellar atmosphere that smear out a star's spectral lines without changing their effective width. The effect of macroturbulence is particularly noticeable in the spectra of giant and supergiant stars. Compare with microturbulence. Related category STELLAR ASTROPHYSICSAlso on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History |