What term refers to the absence of melanin pigmentation of the body?

The term that refers to the absence of melanin pigmentation in the body is albinism. Albinism is a genetic condition characterized by a lack of melanin, which affects the skin, hair, and eyes, resulting in a lighter coloration than typical for the individual's background. Individuals with albinism have an increased sensitivity to sunlight and a higher risk of skin cancers due to this absence of pigmentation.

Hypertrichosis refers to excessive hair growth, which is not related to pigmentation levels in the skin. Dermatitis is an inflammatory condition of the skin that can be caused by various factors, including allergies or irritants, while psoriasis is a chronic skin condition characterized by the rapid growth of skin cells, leading to scaling and redness. Neither dermatitis nor psoriasis directly pertains to melanin production or pigmentation.