* A misspelling of "porcelain": A type of ceramic material known for its smooth, white, and glossy surface.
* A company name: Porvair is a global company that manufactures and supplies a variety of products, including filters, membranes, and other materials.
* A place name: There might be a location named Porvair, but it's not widely known.
To understand the meaning of "Porvair" in a specific context, you'll need more information. For example:
* Where did you encounter this word? Was it in a book, a website, or a conversation?
* What was the surrounding text or context?
With more context, I can help you determine the correct meaning of "Porvair".