loculation

noun
loc·​u·​la·​tion | \ ˌläk-yə-ˈlā-shən How to pronounce loculation (audio) \

Medical Definition of loculation

1 : the condition of being or the process of becoming loculated a gradual loculation of bony tissue
2 : a group of loculi usually isolated from surrounding structures (as by a fibrous tissue septum) the development of loculations in empyema