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单词	amygdale
释义	amygdale /əˈmɪɡdeɪl / noun Geology A vesicle in an igneous rock, containing secondary minerals.Segregation vesicles are therefore distinguished from amygdales because they are infilled with chilled magma, whereas amygdales represent the infilling of vesicles from post-emplacement fluids.... Some consist of pear-shaped segregation vesicles with amygdales at their upper margin. If, after the lava has cooled and set, the vesicles are filled with minerals, they are known as amygdales. Origin Late 19th century: from French, from Latin amygdala (see amygdala).
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