of or pertaining to Marcus Tullius Tiro, Cicero's scribe and namesake, 1828, especially in reference to the Tironian Notes (Latin notæ Tironianæ), a system of shorthand said to have been invented by him (see ampersand).
Although involving long training and considerable strain on the memory, this system seems to have practically answered all the purposes of modern stenography. It was still in familiar use as late as the ninth century. ["Century Dictionary and Cyclopedia," New York, 1902]
Page 226—it appears that the word 'cetera' has been omitted following a tironian et.
These are generally adaptations of the shorthand signs known as tironian notes.