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The chemical features of something as they were at some time in the past; the branch of science that deals with these.
Mid 19th century. From palaeo- + chemistry.
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。