lacuna

la·cu·na

noun \lə-ˈk(y)ü-nə\

plural la·cu·nae \-ˈkyü-(ˌ)nē, -ˈkü-ˌnī\

Definition of LACUNA

: a small cavity, pit, or discontinuity in an anatomical structure: as a : one of the follicles in the mucous membrane of the urethra b : one of the minute cavities in bone or cartilage occupied by the osteocytes

—la·cu·nar \-ˈk(y)ü-nər\ adjective

Illustration of LACUNA