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An image of the placenta produced by radiography or ultrasonography; an examination of the placenta by means of such imaging.
1950s. From placenta + -o- + -gram, after placentography.
礼仪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。