ultramicrometer

[ uhl-truh-mahy-krom-i-ter ]

noun

1. a micrometer calibrated to a very fine scale and capable of measuring extremely small magnitudes.

ultramicrometer

/ ˌʌltrəmaɪˈkrɒmɪtə /

noun

1. a micrometer for measuring extremely small distances

Word History and Origins

Origin of ultramicrometer¹

First recorded in 1925–30; ultra- + micrometer ¹