Etymology
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albinism (n.)

"state or condition of being an albino," by 1821; see albino + -ism. Alternative form albinoism is recorded by 1835.

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melanism (n.)

"an undue development of coloring material in the skin," especially in mammals or birds; the opposite of albinism (and the word probably based on it), by 1827; see melano- + -ism. Related: Melanistic.

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