involucrum
/ˌɪnvəˈlukrəm/
noun
- A covering or envelope, especially a protective layer or structure in biology (e.g., the bracts around a flower cluster or a sheath around an organ).
- In botany class, we studied the involucrum that surrounds the flower head of a daisy.
- The involucrum of the sunflower protects the developing seeds.
- The surgeon carefully removed the involucrum around the abscess.