sekundäärin

Could you clarify what you mean by "sekundäärin"? It is not a widely recognized term in English, and I want to ensure the article matches your intended context. Do you mean:

- a linguistic or grammatical term in Estonian (or another language),

- a scientific or technical concept (in fields like geology, chemistry, physics, etc.),

- a cultural or historical notion, a brand, or a fictional concept?

If you provide the domain or a short definition, I can generate a concise, neutral wiki-style article (under 300 words) in plain text. If you prefer, I can also draft a generic stub describing "sekundäärin" as a secondary or second-order concept across various contexts.