chronograph

From Ancient Greek χρονογράφος (khronográphos, “chronicler”). Equivalent to chrono- +‎ -graph.

• (Received Pronunciation) IPA^(key): /ˈkɹɒnəɡɹɑːf/, /ˈkɹəʊ-/, /-ɡɹæf/
• (General American) IPA^(key): /ˈkɹɑnəˌɡɹæf/, /ˈkɹoʊ-/
• Hyphenation: chron‧o‧graph

chronograph (plural chronographs)

1. (obsolete) A chronogram.
2. A device which marks or records time or time intervals.
3. A combination of a watch and a stopwatch.
   • 1941 June, Cecil J. Allen, “British Locomotive Practice and Performance”, in Railway Magazine, page 263:

     Along this critical length Sir Nigel [Gresley], completely unmoved and in a very cheerful humour, came into my compartment and sat down next to me, with the immense chronograph in his hand that he had had made specially for speed recording; [...].

• chronographic

chronograph (third-person singular simple present chronographs, present participle chronographing, simple past and past participle chronographed)

1. (firearms) To make an accurate measurement of the speed of a projectile.