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Từ điển Oxford Advanced Learner 8th
allotrope
allo·trope 7 [allotrope allotropes] BrE [ˈælətrəʊp] NAmE [ˈælətroʊp] noun (chemistry)
one of the different forms in which a chemical element exists. For example, diamond and ↑graphite are allotropes of ↑carbon.
Word Origin:
late 19th cent.: back-formation from ↑allotropy.
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