Most of the particles generated by burning wood are smaller than one micron—a size believed to be most damaging to our lungs.
This unit is the one-thousandth part of a millimeter and is called the micro-millimeter or micron.
The man who studies bacteria measures by the micron, 25,000 of which go to the inch.
But with the destruction of the planet an almost certainty, the collective nervous system was just one micron away from explosion.
Their size is measured by the unit used in the microscope, called the micron, which is about 1⁄25000 of one inch.
micron mi·cron or mi·kron (mī'krŏn')
n. pl. mi·crons or mi·cra (-krə) or mi·krons or mi·kra (-krə)
Abbr. μm See micrometer.