| 单词 | seconds pendulum |
| 释义 | > as lemmasseconds pendulum seconds pendulum n. a pendulum of such a length as to oscillate once every second; a pendulum ‘beating seconds’. ΘΚΠ the world > time > instruments for measuring time > clock > [noun] > pendulum clock > pendulum pendule1660 pendulum1660 simple pendulum1673 bob-pendulum1685 swing1696 quicksilver pendulum1726 pendle1741 gridiron pendulum1751 mercurial pendulum1786 gridiron1793 wanrest1794 seconds pendulum1795 conical pendulum1813 ticker1821 noddy1844 1795 C. Hutton Math. & Philos. Dict. II. 207 The length of a Pendulum, so measured..that it will perform each vibration in a second of time, thence called the second's Pendulum. 1837 W. Whewell Hist. Inductive Sci. II. 283 Determining the length of the seconds' pendulum in different latitudes. < as lemmas |
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