The term “milk” is an old chemistry term referring to a “heterogeneous mixture of insoluble compounds”. “Colloid” is the modern term. Think “milk of magnesia”, which is used as an antacid. It is called a milk because the Mg(OH)2 doesn’t dissolve and just forms a suspension. Almond milk is a suspension of ground up almond particles. Cow milk is a suspension of fat particles that won’t dissolve. This is why milk is homogenized: because it wants to form a floating fat layer and water layer. That’s unappealing so they fake making it look the same throughout. It is not a homogeneous solution. So anything you can mix up in water that doesn’t dissolve and it stays suspended is “milk”.
The term “milk” is an old chemistry term referring to a “heterogeneous mixture of insoluble compounds”. “Colloid” is the modern term. Think “milk of magnesia”, which is used as an antacid. It is called a milk because the Mg(OH)2 doesn’t dissolve and just forms a suspension. Almond milk is a suspension of ground up almond particles. Cow milk is a suspension of fat particles that won’t dissolve. This is why milk is homogenized: because it wants to form a floating fat layer and water layer. That’s unappealing so they fake making it look the same throughout. It is not a homogeneous solution. So anything you can mix up in water that doesn’t dissolve and it stays suspended is “milk”.
Not to consumers, which is ultimately the only thing that should matter when making decisions on how food should and should not be labeled.