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Zoology. A sequence of evolutionary change in mammalian coat colour, consisting of loss of agouti patterning and reduction in pigmentation.
Late 19th century (in an earlier sense). From meta- + -chromism.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。