IPA: //siˈloʊmɪk//
KK: /sɪˈloʊmɪk/
Relating to the coelom, which is a fluid-filled body cavity found in some animals.
The coelomic cavity plays a crucial role in the development of certain organisms.
Coelomic is formed from "coelom" (from Greek "koilos", meaning hollow) and the suffix "-ic" (meaning pertaining to). The term refers to something that pertains to the coelom, which is the body cavity in metazoans that is lined by mesoderm.
Think of 'hollow' ('koilos') to remember that 'coelomic' relates to the body cavity that is hollow.