tachydromian

[TACHYDROMUS.] Any tack ta-chyg-ra-pher, *ta-kig'-ra-pher, s. [Eng. tachygraph(y); -er.] One who writes in shorthand; a stenographer. tăch-y-graphic, tăch-y-graph-Ic-al, adj . [Eng. tachygraph ( y ); -ic , -ical . Of or pertaining to tachygraphy; written in shorthand. ""No help!' said I, 'no tachygraphic pow'r, To interpose in this unequal hour.'" Byrom: Robbery of the Cambridge Coach. tă-chyg-ra-phy, *ta-kig-ra-phy, s. [Greek tachys swift, and graphō -to write.] The act or practice of rapid writing; shorthand, stenography. tăch-y-lite, tăch'-ý-lyte, s. [Pref. tachy- , and Gr. lytos =di olved; Ger. tachylyt .] Min. & Petrol.: A ma ive substance, without cleavage, and resembling obsidian. Formerly regarded as a distinct mineral species, but now shown by Judd and others to be only a vitreous form of basalt, with which it is always a ociated. It varies in composition according to the basalt which it represents, but the percentage of silica present is usually above that of ordinary basalts. tachylite-basalt, s . Petrol.: A basalt in which certain parts, having the general composition of the ma , exist in a vitreous state, this condition (tachylyte) being mostly confined to the sides of the vein or dyke.