gradslåg

Could you provide more context for the term "gradslåg"? I want to ensure I write a precise, neutral wiki-style article, but I’m not certain what field or language the term belongs to. Is it Swedish (or another Nordic language), and does it refer to a concept in science, engineering, linguistics, music, folklore, or something else? If you can share a definition or the intended domain, I’ll draft a concise, neutral article (under 300 words) right away.