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auto- +‎ chronograph


autochronograph (plural autochronographs)

  1. (rare, archaic) An instrument for the instantaneous self-recording or printing of time.
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Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for autochronograph in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)