Definition of micrometre in English:


(US micrometer)


  • One millionth of a metre.

    • ‘On a weight basis, a billion ultra-fine particles are about equivalent to one coarse particle 10 micrometres in diameter, but have one thousand times the surface area.’
    • ‘These microscopic organisms, typically 1-5 micrometres long, are distinguished by the absence of sub-cellular organelles, such as a nucleus, mitochondria, and chloroplasts.’
    • ‘With the laser's ability to be focused to points of a few micrometres or millimetres in diameter, high power densities can be spatially confined to heat target tissues.’
    • ‘Typically, the in-plane resolution is several hundreds of micrometres with observed slices of several millimetres thickness.’
    • ‘Particles between 0.05 micrometres and one micrometre scatter light and radiation, aiding atmospheric reactions.’
    • ‘In this case, the pore fluids precipitate minerals as fast as the fractures are opening, which may happen in multiple episodes, such that the actual space between the facture walls never exceeded a few nanometres or micrometres.’
    • ‘Discovered by an international team of Russian, Norwegian, British and US geoscientists, the diamond fragments at only 20-80 micrometres in size are too small to see without a microscope.’
    • ‘Bacteria or viruses would usually be delivered in a finely-dispersed aerosol with liquid droplet sizes ranging from 1 to 5 micrometres - small enough to enable penetration deep into the lungs.’
    • ‘Fully grown individuals range in size from about 100 micrometers to almost 20 centimeters long.’
    • ‘Setae range in length from a few micrometers to several millimeters.’
    • ‘One micrometer is about the size of an average bacterium.’
    • ‘That distance varies from a few hundred nanometers to a few micrometers, depending on atom velocity.’
    • ‘Challenge: today's chips contain millions of elements with features as small as a fraction of a micrometer (millionth of a meter), projected by visible light.’
    • ‘Pore length was measured as the length of the stomatal pore in micrometres.’
    • ‘Next, the researchers measured profiles of the bullets' surface ridges and grooves to accuracies of 20 nanometers in depth and a few micrometers across the surface.’
    • ‘On top of the lead, they spread a grid of tiny magnetic dots, each measuring 800 nanometers across and separated from its neighbors by 1.5 micrometers.’
    • ‘A careful adjustment of the experimental exchange times should allow the detection of confined motions for typical distance scales between nanometers and micrometers.’
    • ‘In the part of the infrared spectrum trapped by CO2-wavelengths between 13 and 19 micrometres - they found that between 1970 and 1997 less and less radiation was escaping.’
    • ‘A pixel density of 2,500 pixels per square millimeter corresponds to a pixel size of only 20 micrometers.’
    • ‘In fact, it can exhibit ordered structures with length scales ranging from micrometers to nanometers.’