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ultramicrometer

[uhl-truh-mahy-krom-i-ter] /ˌʌl trə maɪˈkrɒm ɪ tər/
noun
1.
a micrometer calibrated to a very fine scale and capable of measuring extremely small magnitudes.
Origin
1925-1930
1925-30; ultra- + micrometer
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ultra micrometer

ultramicrometer

/ˌʌltrəmaɪˈkrɒmɪtə/
noun
1.
a micrometer for measuring extremely small distances
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
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