n. An organism that is too small to be seen by the unaided eye, especially a single-celled organism, such as a bacterium.
the GNU version of the Collaborative International Dictionary of English
n. Any microscopic form of life; a form of life too small to be seen by the naked eye; -- particularly applied to bacteria, protozoa, yeasts, and similar organisms, esp. such are supposed to cause infectious diseases.
The Century Dictionary and Cyclopedia
n. A microscopic organism, as a bacillus, bacterium, or vibrio; a microbe; a microzoary.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. any organism of microscopic size
n. any organism of microscopic size
Word Usage
""This study gives a systems biology view of how a phenotype, or a 'network state' advantageous to a microorganism is comprised of a tiny subset of a much larger universe of possibilities as provided for in the genome," said Palsson."