Definition of "micron" []

• A unit of length equal to one millionth (10-6) of a meter. No longer in technical use. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Spanish; another to express the more open vowels; another the less open vowels; for which the word micron is here used, and for which the word mega is here used."
• "Motility of bacteria, such as Salmonella and E. coli with a body size of 1 ~ 2 micron, is driven by rapid rotation of a helical propeller by such a tiny little motor at its base."
• "Ch Spanish; another to express the more open vowels; another the less open vowels; for which the word micron is here used, and for which the word mega is here used."