chronograph
n.
"precise time-measuring device," 1868, from chrono- "time" + -graph "instrument for recording; something written." Compare Greek khronographos "recording time and events" (adj.); "a chronicler" (n.).
〔李〕n.录时器 [graph=a measuring device] ←chron（o）-[GK] =time时间
〔李〕n. 记时器 [chrono- =time] ←-graph [GK] =sth.that writes or records表示“书写器；记录器”
〔蒋〕[chrono时，graph记录器] 记时器，录时器