Chlamydiaceae
noun pluralMedical Definition of Chlamydiaceae
: 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