Medical Dictionary


noun la·cu·na \lə-ˈk(y)ü-nə\
plural la·cu·nae \-ˈkyü-(ˌ)nē, -ˈkü-ˌnī\

Medical 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


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