ultramicrometer

[ uhl-truh-mahy-krom-i-ter ]
/ ˌʌl trə maɪˈkrɒm ɪ tər /

noun

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

Origin of ultramicrometer

First recorded in 1925–30; ultra- + micrometer1

Words nearby ultramicrometer

ultramarine, ultrametamorphism, ultramicrobalance, ultramicrochemistry, ultramicrofiche, ultramicrometer, ultramicroscope, ultramicroscopic, ultramicroscopy, ultramicrotome, ultraminiature

British Dictionary definitions for ultramicrometer

ultramicrometer
/ (ˌʌltrəmaɪˈkrɒmɪtə) /

noun

a micrometer for measuring extremely small distances