1. The act of being diluted. 2. A diluted solution or mixture. 3. In microbiologic techniques, a method for counting the number of viable cells in a suspension; a sample is diluted to the point where an aliquot, when plated, yields a countable number of separate colonies.
* * *
di·lu·tion dī-'lü-shən, də- n
1) the action of diluting: the state of being diluted
2) something (as a solution) that is diluted
* * *
di·lu·tion (di-looґshən) 1. the process of diluting or the state of being diluted. 2. a substance that has undergone dilution. 3. in homeopathy, the diffusion of a given quantity of a medicinal agent in ten or one hundred times the same quantity of water.Medical dictionary. 2011.