Where does “extragalactic background light” come from?
extragalactic background light (English) comes from English extragalactic, from English galactic, from French galactique, from Latin galacticus, from Ancient Greek γαλακτικός, from Ancient Greek -ικός, from Ancient Greek -κός, from Proto-Indo-European -ḱos — -y, -ic.
extragalactic background light (English): All the accumulated radiation in the universe due to star formation processes, plus a contribution from active galactic nuclei (AGNs)
Definitions
- All the accumulated radiation in the universe due to star formation processes, plus a contribution from active galactic nuclei (AGNs)
Ancestry of “extragalactic background light”, step by step
extragalactic background light traces back through 3 separate lines of ancestry.
via English extragalactic
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | extragalactic | Originating outside of the Milky Way galaxy;... |
| 2 | English | galactic | Of or pertaining to milk, or the secretion of... |
| 3 | French | galactique | galactic; galactical |
| 4 | Latin | galacticus | milky |
| 5 | Ancient Greek | γαλακτικός | milky; milky" |
| 6 | Ancient Greek | -ικός | of or pertaining to, in the manner of; -ic |
| 7 | Ancient Greek | -κός | forms adjectives with the sense of 'of or... |
| 8 | Proto-Indo-European | -ḱos | -y, -ic |
via English background
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | background | Less important or less noticeable in a scene or... |
| 2 | English | ground | The surface of the Earth, as opposed to the sky... |
| 3 | Middle English | ground | ground; Earth |
| 4 | Old English | grund | ground; bottom, foundation; abyss, depths |
| 5 | Proto-Germanic | grunduz | ground, foundation |
| 6 | Proto-Indo-European | gʰrem- | to be angry; to sound, bellow, growl, roar, be... |
| 7 | Proto-Indo-European | gʰer- | to rub; to stroke; to grind |
via English Light
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | Light | A place name |
| 2 | Middle English | light | The radiation which allows for vision by... |
| 3 | Old English | lēoht | luminous, bright, light, clear, resplendent,... |
| 4 | Proto-West Germanic | leuht | light, bright; light |
| 5 | Proto-Germanic | leuhtą | light |
| 6 | Proto-Indo-European | lewktom | — |
| 7 | Proto-Indo-European | lewk- | bright; to shine; to see |