Definition of "micro" []

• Very small or microscopic. (adjective)
• Basic or small-scale: the economy's performance at the micro level. (adjective)
• A microcomputer. (noun)
• A microprocessor. (noun)
• A microbrewery. (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.

• "This is a bit belated, but you can do the symbol(s) for micrometre ( µm ) like this: &_micro_;m (omit the underscores)."
• "The term micro-blogging was used because twitter, the first micro-blogging service, at least to my knowledge, defined it that way."
• "In many respects the term micro-blogging is a bit of a misnomer."