Any of various devices designed to convey messages over a distance using visible or audible signs or signals; cf. semaphore, n. 1. Also (esp. in…
| 单词 | θ191741 |
| 释义 | society > communication > indication > signalling > visual signalling > semaphore > [noun] > apparatus (8) telegraph1793 Any of various devices designed to convey messages over a distance using visible or audible signs or signals; cf. semaphore, n. 1. Also (esp. in… tellograph1796 A semaphore apparatus invented by R. L. Edgeworth (1744–1817), English educational writer and engineer. semaphore1815 A signalling apparatus consisting of an upright post with one or more arms that can be moved in a vertical plane, different positions of the arm or… semaphore signal1826 = semaphore, n. 1. shutter-telegraph1859 = semaphore, n. bell-telegrapha1877 an instrument in which two bells are used to transmit a message, one indicating (by its tone) the movement of the needle to the right, the other, to… Subcategories:— signalling by (1) — signal transmitted by (1) |
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