Morse code \Morse" code"\ (Teleg.) The telegraphic code, consisting of dots, dashes, and spaces, invented by Samuel B. Morse. The Alphabetic code which is in use in North America is given below. In length, or duration, one dash is theoretically equal to three dots; the space between the elements of a letter is equal to one dot; the interval in spaced letters, as O . ., is equal to three dots. There are no spaces in any letter composed wholly or in part of dashes.

Note: Alphabet A .- H .... O . . V ...- B - . . . I .. P ..... W .-- C .. . J -.-. Q ..-. X .-.. D -.. K -.- R . .. Y .. .. E . L --- S ... Z ... . F .-. M -- T -- & . ... G --. N -. U ..- Numerals 1 .--. 4 . . . .- 7 --.. 2 ..-.. 5 --- 8 - . . . . 3 . . . -. 6 . . . . . . 9 -..- 0 ---- Period ..--.. Comma .-.- The International (Morse) code used elsewhere is the same as the above with the following exceptions. C -.-. L .-.. Q --.- Y -.-- F ..-. O --- R .-. Z --.. J .--- P .--. X -..- The Morse code is used chiefly with the electric telegraph, but is also employed in signalling with flags, lights, etc.

Source: Webster's Revised Unabridged Dictionary (1913)