chronograph

What it means

1. obsoleteA chronogram.
2. A device which marks or records time or time intervals.
3. A combination of a watch and a stopwatch.

   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; [...].

   1941 June, Cecil J. Allen, “British Locomotive Practice and Performance”, in Railway Magazine, page 263

In a sentence

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; [...].

1941 June, Cecil J. Allen, “British Locomotive Practice and Performance”, in Railway Magazine, page 263

Where it comes from

1. Ancient Greekχρονογράφος“chronicler”
2. Englishchronograph

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