Definition of comedo in English:

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Pronunciation: /ˈkäməˌdō/

noun (plural comedones /ˌkäməˈdōnēz/)

Technical term for blackhead (sense 1).
Example sentences
  • This is a chronic inflammation of the hair follicle and sebaceous gland (pilosebaceous unit) characterized by pustules, comedones, cysts, and scars, and it affects most adolescents.
  • The first technique works wonders in treating large boils, abscesses (whether hot or cold), and evidently, also big or tight clusters of acne pustules and comedones.
  • This results in enlargement of the sebaceous glands, which can eventually lead to the development of comedones (black-heads).


Mid 19th century: from Latin, literally 'glutton', from comedere 'eat up', from com- 'altogether' + edere 'eat'. Used formerly as a name for parasitic worms, the term here alludes to the wormlike matter that can be squeezed from a blackhead.

For editors and proofreaders

Syllabification: com·e·do

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