Here are some ways to use it in a sentence:
* Formal/Medical: "The surgeon carefully examined the patient's frenulum linguae before proceeding with the procedure."
* Technical: "A frenulum linguae that is too short can cause difficulty speaking and eating, a condition known as ankyloglossia."
* Informative: "The frenulum linguae is a small, but important structure that helps with tongue movement."
However, it's generally more appropriate to use simpler language when talking about this anatomical feature, such as "tongue tie" or "the fold under the tongue."