Definition of chlamydia in English:


Syllabification: chla·myd·i·a
Pronunciation: /kləˈmidēə

noun (plural same or chlamydiae /-ˈmidēˌē/)

  • A very small parasitic bacterium that, like a virus, requires the biochemical mechanisms of another cell in order to reproduce. Bacteria of this type cause various diseases including trachoma, psittacosis, and nonspecific urethritis.
    • Genus Chlamydia and order Chlamydiales
    More example sentences
    • For example, if the herpes virus or chlamydia bacteria get into the eye, the symptoms tend to be more severe and last longer.
    • Several other organisms such as mycoplasma or chlamydia also can cause pneumonia.
    • Because chlamydiae are bacteria, antibiotics can thwart the infections they produce.



More example sentences
  • In addition to the usual common cold viruses, chlamydial pneumonia and herpes simplex virus infections may play a role in exacerbations of bronchospasm in patients with and without asthma.
  • The evidence is inconclusive, however, about whether condoms can prevent genital herpes, syphilis, chancroids, chlamydial infection, trichomoniasis, or gonorrhea (in women).
  • The patient's medical history was notable for multiple unusual infections, including balanitis, chlamydial conjunctivitis, multiple episodes of pneumonia, and upper respiratory tract infections.


1960s: modern Latin (plural), from Greek khlamus, khlamud- 'cloak'.

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Pronunciation: skōSH
a small amount; a little