Chlamydiaceae

noun plural

Chla·​myd·​i·​a·​ce·​ae klə-ˌmid-ē-ˈā-sē-ˌē 

: a family of bacteria (order Chlamydiales) that are related to members of the order Rickettsiales, that are obligate parasites in the cells of warm-blooded vertebrates, and that include the causative agents of trachoma, lymphogranuloma venereum, and psittacosis see chlamydiosis