tachˈygraph, tachygˈrapher or tachygˈraphist noun

A shorthand writer, a stenographer or practitioner of tachygraphy

tachygraphˈic or tachygraphˈical adjective

tachygˈraphy noun

1. Shorthand, esp that used by the ancient Greeks and Romans
2. The abbreviated form of Greek and Latin found in medieval manuscripts

tachˈylyte noun (also tachˈylite; Gr lytos melted, because easily fused; mineralogy)

A black opaque glass occurring as a thin selvage to intrusive basalt

tachylytic or tachylitic /-litˈik/ adjective

tachymˈeter noun

A tacheometer (qv)

tachymetˈric or tachymetˈrical adjective

tachymˈetry noun

tachyphasia /-fāˈzi-ə/ or tachyphrasia /-frāˈzi-ə/ noun

(Gr phasis utterance, phrasis speed) abnormally rapid or voluble speech

tachyphylaxis /-fi-lakˈsis/ noun

(Gr phylax a guard) rapid build-up of tolerance to the effects of a drug

tachypnoea or (US) tachypnea /-ip-nēˈə/ noun

(Gr -pnoia breathing) abnormally rapid respiration