lülis

Could you clarify what "lülis" refers to? I want to ensure the article is accurate. Possible interpretations include:

- An Estonian term related to vertebrae (for example, a form of the word "lüli"/"lülid" used in anatomy)

- A proper noun (a name of a person, place, organization, or project)

- A fictional concept or other specific topic

If you specify which sense you want, I’ll write a concise, neutral wiki-style article under 300 words.