n, pl  la*cu*nae   :  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 adj 
 
 
 
Similar sounding terms:  leu·kin  leu·kon 
 
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