: an act of showing someone how something is used or done : demonstration. 1  I saw a demo on how to use the computer program. 2  The salesman gave us a demo of the vacuum cleaner, and it seemed to work very well. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples 3
If however, you are talking about some maggots in a bowl of wet food (either canned food or dry food which got wet or which you deliberately added fluid to) it is a different matter. Maggots come from flies eggs and they take some set period of time to hatch from the eggs.
exists and is an alternate of . Francesco Redi did an experiment in 1668 that disproved a belief that maggots spontaneously generated on rotting meat. His experiment was to place meat into sets of jars: one set he left open to the air, one set he covered with very fine gauze, one set was completely sealed.