Definition of "chronoscope" []

• An optical instrument for the precise measurement of very small time intervals. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• ""He'd used a device he called a chronoscope to search the history of Earth."
• "The story was about a machine called the chronoscope, which had the power to view the past anywhere in the world, and the efforts of three scientists to wrest the device from strict research limits set by the government."
• "Consequently, logically, his invention had to be referred to as a chronoscope if the exact name was to be reliable (from Greek skopein = to see, in contrast to Greek graphein = to write)."