mesosome

noun

me·​so·​some ˈme-zə-ˌsōm 

ˈmē-,

-sə-

: an organelle of bacteria that appears as an invagination of the plasma membrane and functions either in DNA replication and cell division or excretion of exoenzymes

Word History

First Known Use

1960, in the meaning defined above

Medical Definition

mesosome

noun

me·​so·​some ˈmez-ə-ˌsōm, ˈmēz-, ˈmēs-, ˈmes- 

: an organelle of bacteria that appears in electron micrographs as an invagination of the plasma membrane and is a site of localization of respiratory enzymes