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1. Any of several inherited conditions characterized by the reduction or absence of the pigment melanin in a person or animal, resulting in lack of pigmentation in the eyes, skin, and hair. Humans with albinism usually have vision problems.
2. Lack of chlorophyll in a plant or plant part, resulting in a pale color.
[French albinisme, from German Albinismus, from Albino, albino, from Portuguese; see albino.]