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chronograph

[kron-uh-graf, -grahf]
noun
  1. a timepiece fitted with a recording device, as a stylus and rotating drum, used to mark the exact instant of an occurrence, especially in astronomy.
  2. a timepiece capable of measuring extremely brief intervals of time accurately, as a stopwatch able to record fractions of a second as well as elapsed time.
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verb (used with object)
  1. to time by means of a chronograph.
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Origin of chronograph

First recorded in 1655–65; chrono- + -graph
Related formschro·nog·ra·pher [kruh-nog-ruh-fer] /krəˈnɒg rə fər/, nounchron·o·graph·ic [kron-uh-graf-ik] /ˌkrɒn əˈgræf ɪk/, adjectivechron·o·graph·i·cal·ly, adverbchro·nog·ra·phy, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for chronographically

chronograph

noun
  1. an accurate instrument for recording small intervals of time
  2. any timepiece, esp a wristwatch designed for maximum accuracy
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Derived Formschronographer (krəˈnɒɡrəfə), nounchronographic (ˌkrɒnəˈɡræfɪk), adjectivechronographically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for chronographically

chronograph

n.

"precise time-measuring device," 1868, from chrono- "time" + -graph "instrument for recording; something written." Cf. Greek khronographos "recording time and events" (adj.); "a chronicler" (n.).

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Online Etymology Dictionary, © 2010 Douglas Harper