Lodestone

(noun.) a permanent magnet consisting of magnetite that possess polarity and has the power to attract as well as to be attracted magnetically.

卡洛斯录入

• At present the lodestone is little used. 佚名. 神奇的知识之书.
• There are three primary kinds of magnets: the lodestone or natural magnets, the artificial or permanent steel magnet, and the electric magnet. 佚名. 神奇的知识之书.
• That thought became his lodestone, and he left all his other work to accomplish it. 鲁伯特·萨金特·荷兰. 历史性发明.
• The properties of the lodestone and the permanent magnet have been known for thousands of years, while the electric magnet is a comparatively recent discovery. 佚名. 神奇的知识之书.

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