单词 | dot-and-dash |
释义 | dot-and-dashadj. Formed by or consisting of dots and dashes (in various senses of dot n.1 and dash n.1); esp. designating the Morse alphabet (see Morse n.3), or a message transmitted using it. Also in extended use. dot-and-dash line n. a line written or printed as a repeated sequence of alternating dots and dashes, usually in order to distinguish it from other, dotted or solid, lines; cf. dotted line n. 1. ΘΚΠ the world > space > relative position > arrangement or fact of being arranged > other specific arrangements > [adjective] > other spec. quincuncial1601 triangled1610 squared1667 dot-and-dash1850 echeloned1857 1850 Sci. Amer. 16 Nov. 70/3 Neither of these gentlemen invented the dot and dash alphabet. 1876 W. H. Preece & J. Sivewright Telegraphy (ed. 2) 73 Instruments employed in recording the dot and dash signals. 1901 G. B. Shaw in Anglo-Saxon Rev. Mar. 228 This was a more sensible system, and less harshly crushing to the singer, than the dot and dash system of using trumpets and drums. 1922 Jrnl. Educ. Res. 5 187 (caption) Full line represents first grade, dot-and-dash line represents second grade. 1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) viii. 207 Nucleolitoida, in which the pore-pairs of the upper surface take on a ‘dot-and-dash’ form. 2006 N. A. Downie Exploding Disk Cannons 198 When pioneer Samuel Morse sent his first dot-and-dash coded messages, he wanted a system that would transmit messages efficiently. This entry has been updated (OED Third Edition, June 2019; most recently modified version published online March 2022). > as lemmasdot-and-dash f. One of the two signals (the other being the dot) which in various combinations make up the letters of the Morse alphabet. Also dash-and-dot, more usually dot-and-dash (dot n.1 and prep. Compounds). ΘΚΠ society > communication > telecommunication > telegraphy or telephony > telegraphy > [noun] > telegraphic message > code > Morse code > signs in dot1838 dash1859 long1867 short1891 dah1942 dit1942 V-sign1959 1859 T. P. Shaffner Telegr. Man. 469 Whether the dots, spaces, and dashes be long or short, they should be uniform. 1873 F. Jenkin Electr. & Magn. xxii. §4 Morse signals are sent by a simple key... A short depression or mere tap sends the short elementary signal technically called a dot; a longer depression sends the second elementary signal technically called a dash. 1882 Ogilvie's Imperial Dict. (new ed.) Suppl. Dash-and-dot, consisting of dashes and dots; as, the dash-and-dot alphabet. 1916 J. Buchan Greenmantle xx. 268 The sound was regular and concerted—dot, dash, dot—dash, dot, dot…the longs and shorts of the Morse Code. 1942 Electronic Engin. 15 36 On automatic sending it transmits S.O.S. three times followed by a long dash. < adj.1850 as lemmas |
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