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n. pl. com·e·dos or com·e·do·nes (-dō′nēz)
The primary lesion of acne vulgaris, consisting of a hair follicle that is occluded with sebum and keratin; a blackhead or whitehead.

[Latin comedō, glutton (from a comparison of the wormlike shape of the waxy material that can be squeezed from a blackhead to a worm believed to feed on the body), from comedere, to eat up : com-, intensive pref.; see com- + edere, to eat; see ed- in Indo-European roots.]


n, pl comedos or comedones (ˌkɒmɪˈdəʊniːz)
(Pathology) pathol the technical name for blackhead
[C19: from New Latin, from Latin: glutton, from comedere to eat up, from com- (intensive) + edere to eat]



1. a small, black-tipped fatty mass in a skin follicle, esp. of the face; comedo.
2. any of several birds having a black head.
3. an intestinal and liver disease of turkeys, chickens, and related birds, caused by the protozoan Histomonas meleagridas, often darkening the skin of the head.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.comedo - a black-tipped plug clogging a pore of the skincomedo - a black-tipped plug clogging a pore of the skin
blemish, mar, defect - a mark or flaw that spoils the appearance of something (especially on a person's body); "a facial blemish"
cutis, skin, tegument - a natural protective body covering and site of the sense of touch; "your skin is the largest organ of your body"


n (pl comedones) comedón m, espinilla (fam)
References in periodicals archive ?
Pathologic assessment of DCIS is focused on determining the extent of disease and margin status, both parameters that have been shown to be associated with local recurrence (21) as well as grade and presence of comedo necrosis, variables that are currently taken into consideration when adjuvant treatment is considered (22).
Cosmetics, and some moisturisers, too, can cause acne by blocking the pores with a greasy layer that encourages the proliferation of bacteria, providing the ideal conditions for comedones, or blackheads, to develop (a comedo being the basic acne lesion).
meu gato nao para em casa quando para emcasa que pega o passarinho este gato esta muito assutado comedo do cachorro porque o cachorro que pegaele
A family history of early onset sarcoma, glioma or other childhood tumours should be sought and if the breast cancer is a comedo ductal carcinoma in situ (DCIS), or has occurred within an area of comedo DCIS, TP53 testing with genetic counselling should be offered.
Histopathology showed anaplastic tumor cells arranged in irregular, lobular formation with central necrosis giving it a comedo pattern.
Solid, micropapillary and comedo types were present in all 3 biopsies.
The line reproduces the comedo form of DCIS, which accounts for about 40% of cases.
28) Altogether, these events may influence one or more of the four underlying causes of acne: (i) increased proliferation of basal keratinocytes within the pilosebaceous duct; (ii) abnormal desquamation of follicular corneocytes; (iii) androgen-mediated increases in sebum production; and (iv) colonisation and inflammation of the comedo by Propionibacterium acnes.
Comedo DCIS is associated with areas of necrosis (debris) within the cancer cells.
The main tumor mass was reported as metaplastic carcinoma, with foci of solid and comedo ductal carcinoma in situ extending beyond the margins of the main tumor mass.