kasvinosan

Could you clarify what you mean by "kasvinosan"? It isn’t a widely established term in Finnish grammar, and I want to ensure I write about the exact concept you have in mind. Are you referring to a specific field (for example linguistics, education, or another discipline), or is this a neologism or fictional concept? If you can provide a brief definition or context, I can generate a concise, neutral wiki-style article under 300 words.