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n. pl. su·per·gal·ax·ies
A very large group of galaxies.


(ˈsu pərˌgæl ək si)

n., pl. -ax•ies.
a system of galaxies.
su`per•ga•lac′tic (-gəˈlæk tɪk) adj.
References in periodicals archive ?
Our modern world-picture, with its galaxies, its supergalaxies, its metagalaxy, was perceived--consciously perceived--all within the last 16 years.
It is thought eventually, there will be just a few supergalaxies in the universe.
But viewed in the infrared, they turn into supergalaxies, seething with a hidden fire.