Is spore.
The tough white coating of the eye is called the sclera.
The clear curved membrane that covers the front of the eye is called the cornea. It also focuses light onto the retina.
Trichomes
A cuticle is the waxy material that helps plants retain water.
Epidermis
Before they moult it, the protective coating of arthropods is referred to as the exoskeleton. The pieces of moulted exoskeleton after removal are called exuviae.
The cuticle - a waxy layer that protects a leaf's moisture.
The coating on a window is sometimes called filmy because it has a protective filmy covering which should protect it from smearing due to bugs and constant exposure to pollution.
The tough white coating of the eye is called the sclera.
Hitler's bodyguard force was called the Schutzstaffel ('protective echelon'), usually shortened to SS.
A virus has a protective protein coating called the capsid. The capsid is a cover for the genetic material inside, either RNA or DNA.
The coating on aspirin is called an enteric coating.
The white outer coating on teeth is called enamel.
The white outer coating on teeth is called enamel.
The clear curved membrane that covers the front of the eye is called the cornea. It also focuses light onto the retina.
For plant cells, they have a cell membrane and covering the cell membrane is a cell wall. The cell wall is for the structure of the plant. For animal cells, they just have a cell membrane.
Your skin is only about 1-2mm thick, your shape comes from your bones, muscle and fat.