Definition that contains imaginary creature
- monster an imaginary creature usually having various human and animal parts
- unicorn an imaginary creature represented as a white horse with a long horn growing from its forehead
- maxwell's demon an imaginary creature that controls a small hole in a partition that divides a chamber filled with gas into two parts and allows fast molecules to move in one direction and slow molecules to move in the other direction through the hole; this would result in one part of the container becoming warmer and the other cooler, thus decreasing entropy and violating the second law of thermodynamics