dot and dashv.
/ˌdɒt (ə)n(d) ˈdaʃ/, U.S. /ˌdɑt n̩ ˈdæʃ/ transitive. To use Morse code to send (a message) by electric telegraph. Now rare.
ΚΠ
1862 Scotsman 16 July 3/1 Induced by the electric current to touch the edge of the little wheel, so as to dot and dash the message.
1901 W. T. Spencer in Academy 28 Sept. 266/2 Dickens..sat back in his chair, dot-and-dashing telegrams from Fancy-land.
1998 Re: Why learn CW!!! in rec.radio.amateur.policy (Usenet newsgroup) 28 July Even they [sc. Q-codes] are independant [sic] of the Morse Code—you can use them with RTTY, ASCII or even voice with no changes at all—there is no need to dot and dash them to send them.
This entry has been updated (OED Third Edition, June 2019; most recently modified version published online March 2022).
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