The phrase "outer coating" refers to a layer or covering on the outside of something. It is a protective or decorative covering that provides a barrier between the object or surface and its surroundings.
Sentences with «outer coating»
They might use this energy to fuel their creation of that hard outer coat of minerals. (sciencenewsforstudents.org)
You have a light and crispy outer coating with a soft potato and caramelized onion center... why? (pearltrees.com)
This shepherd breed has a short and smooth coat that has a soft under coat and a harsh outer coat. (caninejournal.com)