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        | baldness, deficiency of hair |  | 
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        | a plug of sebum within the opening of a hair follicle |  | 
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 | Definition 
 
        | below the skin surface with a white center |  | 
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 | Definition 
 
        | open to the skin surface with a black center caused by the presence of melanin exposed to air |  | 
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        | Term 
 | Definition 
 
        | appearance of a skin lesion |  | 
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 | Definition 
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 | Definition 
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 | Definition 
 
        | a general term for skin eruption, most often associated with communicable disease |  | 
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 | Definition 
 
        | skin color due to the presence of melanin |  | 
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        | Term 
 | Definition 
 
        | loss of melanin in the skin |  | 
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        | Term 
 | Definition 
 
        | areas of skin lacking color due to deficient amounts of melanin |  | 
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        | Term 
 | Definition 
 
        | darkened areas of skin caused by excessive amounts of melanin |  | 
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        | Term 
 | Definition 
 
        | production of purulent matter (pus) |  | 
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        | Term 
 | Definition 
 
        | hives; eruption of wheals on the skin accompanied by itch |  | 
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 | Definition 
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