英语词汇“electric time-ball”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	electric time-ball
释义	> as lemmas electric time-ball † electric time-ball n. Obsolete a large globe that an electric timer causes to be dropped at a particular time, in order to mark the time. ΚΠ 1859 T. P. Shaffner Telegr. Man. liii. 743 It was the electric time-ball, indicating the second, and the most minute division of time!. 1881 Science 7 May 210/1 (heading) The Kansas City electric time ball. extracted from electricadj.n. < as lemmas
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