It used to be "secretion from the mammary glands of certain farm animals" but you can rephrase it to "liquid that is taken from a particular protein source — a coconut, a soy[bean], a cow, a goat..."
https://www.foodingredientsfirst.com/news/european-court-rul...
Here's in EU coconut milk: https://hjem.foetex.dk/produkt/kokosmaelk-max-18-fedt-oeko/6...
And another EU retailer selling goat milk: https://naturkost-odense.dk/product_info.php?products_id=202
These new products are designed to replace actual milk for use in consumption. So there does entail danger of confusion, hence, the restriction on calling them milk.
This is milk, but not in Europe
> This is milk, but not in Europe
Do you know what they call a quarter pounder with cheese in Europe?- milc (Anglian)
- Proto-Germanic meluk
- Old Norse mjolk
- Old Frisian melok
- Old Saxon miluk
- Dutch melk
- Old High German miluh
- German Milch
- Gothic miluks
- Czech mléko, Serbian млеко, Russian молоко, ..