Leucistic is an adjective describing an organism with reduced pigmentation, typically white or pale due to a lack of melanin. It denotes a genetic condition or appearance rather than a disease, and is used across biology, zoology, and ornithology. The term is often paired with species names (e.g., leucistic birds) to specify a color variation. It contrasts with albinism by usually preserving normal eye color and partial pigmentation in some tissues.
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