studn

Could you clarify what you mean by "studn"? It is not a widely recognized term on its own, and its meaning could vary by domain (for example, a brand or product name, an acronym for a project or organization, a cultural term, or something in a specific language). If you provide the intended context or domain (technology, biology, culture, geography, etc.), I can write a concise, neutral wiki-style article under 300 words.