A human eyelid is not transparent of course. But some animals like snakes have permanently sealed transparent eyelids which protect their eyes from foreign materials. Frogs also have transparent eyelids to protect its eyes while swimming in water.
Technically, they are translucent and not opaque as they allow some light through. Close your eyes and shine a bright light at your eyelids. You will see the brightness.
Aluminum foil is opaque.
Opaque
It is opaque
There are many objects that no light can pass through, although of course, it depends on what type of light you're talking about. The name of the type of object that visible light cannot pass through is called opaque.
Yes, a carpet is opaque.
Aluminum foil is opaque.
no they dont have eyelids
Dogs actually have 3 eyelids.
Opaque
It is opaque
3 eyelids
Yes, dinosaurs did have eyelids.
it is opaque
more opaque [comparative] most opaque [superlative]
3 eyelids
Rats have eyelids.
Eyelids are accessories of the eye. They are not organs.