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单词 blackhead
释义

Definition of blackhead in English:

blackhead

noun ˈblakhɛdˈblækˌhɛd
  • 1A plug of sebum in a hair follicle, darkened by oxidation.

    Example sentencesExamples
    • If the lipid material accumulates in the hair follicle, we have the formation of comedones, or blackheads.
    • If mixed with the secretion of the sebaceous glands, blackheads will come up on the face.
    • The resulting build up of sebum behind the blockage helps produce blackheads and whiteheads.
    • You have moderate acne if you have swelling, red bumps, or pustules, along with the whiteheads and blackheads.
    • Typically, people with acne get blackheads.
    • Acne is the blanket term used for skin irritations, including blackheads, whiteheads, pimples, and the deeper cysts that may form on your shoulders, neck, face or other areas.
    • Like benzoyl peroxide, sulfur keeps bacteria in check and works wonders on whiteheads, blackheads and pimples.
    • Salicylic acid is effective, especially on whiteheads and blackheads.
    • Together with dead skin cells, the sebum blocks the hair follicles, which enables the formation of ‘spots’ ranging from blackheads to painful red nodules.
    • Patient education is important since attempts to extrude blackheads or pustules may lead to deeper, potentially scarring lesions.
    • Most people have noninflammatory acne, a relatively mild form with just a few whiteheads and blackheads.
    • Most teens that get acne have the milder form, called non-inflammatory acne, and get just a few blackheads or whiteheads every now and then.
    • Sam's fleshy, thin, potato-chip ears, small patches of white hair on his head, blackheads, brown warts and moles make him hard to beat in the ugliest dog contest.
    • Even though some people with rosacea had acne as teenagers, the disorder has little to do with the pimples and blackheads that commonly afflict teenagers.
    • But how do you get someone to see all the love and longing lurking behind pimples, blackheads and misty specs?
    • These pimples vary according to the severity of the acne and range from whiteheads, blackheads, pustules and nodules to cysts.
    • I could see every single blackhead on his nose, and the imprints where his glasses rested, as well as the flecks of brown in his angry black eyes.
    • The reality, says the spa manager, is that a regular facial is crucial for deep exfoliation and treatment for lines, dehydration, oily skin, scarring, blocked pores and blackheads.
    • The bumps can be blackheads, whiteheads, pimples, or cysts.
    • Do not try to remove blackheads or squeeze spots.
  • 2mass noun An infectious disease of turkeys producing discoloration of the head, caused by a protozoon.

    Example sentencesExamples
    • Turkeys at two Dutch farms were diagnosed with parasite-borne blackhead, but the government was not very concerned because about 10 cases of the disease are reported each year.
    • Ten million turkeys being reared for the festive period are at risk from blackhead, a parasitic liver disease which causes birds to waste away.
    • Turkey farmers in the UK are in a panic over blackhead disease, fearing an outbreak among their flocks after the drug they used to rely on was banned.
 
 

Definition of blackhead in US English:

blackhead

nounˈblækˌhɛdˈblakˌhed
  • 1A plug of sebum in a hair follicle, darkened by oxidation.

    Example sentencesExamples
    • These pimples vary according to the severity of the acne and range from whiteheads, blackheads, pustules and nodules to cysts.
    • Salicylic acid is effective, especially on whiteheads and blackheads.
    • Like benzoyl peroxide, sulfur keeps bacteria in check and works wonders on whiteheads, blackheads and pimples.
    • Most people have noninflammatory acne, a relatively mild form with just a few whiteheads and blackheads.
    • The bumps can be blackheads, whiteheads, pimples, or cysts.
    • Sam's fleshy, thin, potato-chip ears, small patches of white hair on his head, blackheads, brown warts and moles make him hard to beat in the ugliest dog contest.
    • If mixed with the secretion of the sebaceous glands, blackheads will come up on the face.
    • Typically, people with acne get blackheads.
    • You have moderate acne if you have swelling, red bumps, or pustules, along with the whiteheads and blackheads.
    • The reality, says the spa manager, is that a regular facial is crucial for deep exfoliation and treatment for lines, dehydration, oily skin, scarring, blocked pores and blackheads.
    • Acne is the blanket term used for skin irritations, including blackheads, whiteheads, pimples, and the deeper cysts that may form on your shoulders, neck, face or other areas.
    • Even though some people with rosacea had acne as teenagers, the disorder has little to do with the pimples and blackheads that commonly afflict teenagers.
    • If the lipid material accumulates in the hair follicle, we have the formation of comedones, or blackheads.
    • The resulting build up of sebum behind the blockage helps produce blackheads and whiteheads.
    • Together with dead skin cells, the sebum blocks the hair follicles, which enables the formation of ‘spots’ ranging from blackheads to painful red nodules.
    • Most teens that get acne have the milder form, called non-inflammatory acne, and get just a few blackheads or whiteheads every now and then.
    • Patient education is important since attempts to extrude blackheads or pustules may lead to deeper, potentially scarring lesions.
    • But how do you get someone to see all the love and longing lurking behind pimples, blackheads and misty specs?
    • I could see every single blackhead on his nose, and the imprints where his glasses rested, as well as the flecks of brown in his angry black eyes.
    • Do not try to remove blackheads or squeeze spots.
  • 2An infectious disease of turkeys producing discoloration of the head, caused by a protozoan.

    Example sentencesExamples
    • Turkeys at two Dutch farms were diagnosed with parasite-borne blackhead, but the government was not very concerned because about 10 cases of the disease are reported each year.
    • Turkey farmers in the UK are in a panic over blackhead disease, fearing an outbreak among their flocks after the drug they used to rely on was banned.
    • Ten million turkeys being reared for the festive period are at risk from blackhead, a parasitic liver disease which causes birds to waste away.
 
 
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更新时间:2024/12/23 16:47:03