Within a cavity or space, such as the abdomen, pelvis, or chest.
Within an organ or body cavity. ... (05 Mar 2000) ... 
Type: Term Pronunciation: in′tră-cav′i-tār-ē Definitions: 1. Within an organ or body cavity.
intracavitary 1. Within an organ or body cavity. 2. Situated or occurring within a body cavity; especially, relating to, or being treatment (as of cancer) characterized by the insertion of radioactive substances in a cavity.