giant radio galaxy

== English == === Etymology === giant + radio galaxy === Noun === giant radio galaxy (plural giant radio galaxies) (astronomy) a very large radio galaxy; a double radio source having an overall projected linear length exceeding 2 megaparsecs (or more specifically, 2×h50-1 Mpc) ==== Synonyms ==== GRG (abbreviation) ==== Related terms ==== radio galaxy giant quasar