Where does “radiogalaxie” come from?

radiogalaxie (French) comes from French galaxie, from Old French galaxie, from Latin galaxiās, from Ancient Greek γαλαξίας, from Ancient Greek γάλα, from Proto-Indo-European glakt-.

radiogalaxie (French): radiogalaxy

Definitions

radiogalaxy

Ancestry of “radiogalaxie”, step by step

Step	Language	Word	Meaning
1	French	galaxie	galaxy
2	Old French	galaxie	—
3	Latin	galaxiās	the Galaxy, the Milky Way
4	Ancient Greek	γαλαξίας	the Milky Way galaxy; tailor's chalk; dogfish
5	Ancient Greek	γάλα	milk; milky sap; the Milky Way galaxy
6	Proto-Indo-European	glakt-	—

Every word from Proto-Indo-European glakt- →Every word from Ancient Greek γάλα →Every word from Ancient Greek γαλαξίας →