What is kosina?

As an AI language model, there are limitations to the type of specific information I can provide without additional context, but "kosina" could refer to a few different things:

1. "Kosina" is a surname, originating from places such as Poland, Spain, and the Philippines.

2. In geography, a "kosina" (or "kôzina" in some languages) is a term used to describe a specific type of rocky terrain or landscape formation, often found in mountainous regions.

3. In fashion, "kosina" is a term used to describe a type of fur or wool traditionally used for various clothing items, such as coats and hats. Kosina fur usually comes from wild or domesticated raccoon dogs.

Without additional context, it is difficult to provide further information on a specific interpretation of the term "kosina."