From Longman Dictionary of Contemporary Englishmicrometremi‧crom‧e‧tre British English, micrometer American English /ˈmaɪkrəʊˌmiːtə $ -kroʊˌmiːtər/ (also micron /ˈmaɪkrɒn $ -krɑːn/) noun [countable] a unit for measuring length. There are one million micrometres in one metre.
