a chemical reactor for converting oils with high boiling points into fuels with lower boiling points in the presence of a catalyst
- The fire cracker went off and scared Jack's dog.
- It is natural for a cat to catch mice.
- The cat lapped up all the milk in the saucer.
- The old lady fondled her cat as it sat beside her.
- I can't bear having a cat in the house.
- That guy thinks he's the cat's meow.