- any of various devices or tables used to facilitate reckoning, esp a ready reckoner
单词 | reckoner |
释义 | WordReference Random House Unabridged Dictionary of American English © 2024 reck•on•er (rek′ə nər),USA pronunciation n.
Collins Concise English Dictionary © HarperCollins Publishers:: reckoner /ˈrɛkənə/ n
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