Tra từ powder method - Từ điển Oxford Learners Wordfinder Dictionary

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Từ điển Oxford Learners Wordfinder Dictionary

powder method

noun

a process for identifying minerals or crystals;
a small rod is coated with a powdered form of the substance and subjected to suitably modified X-rays;
the pattern of diffracted rings is used for identification
• Syn:
powder photography, powder technique
• Hypernyms:
photography