Polyene is a big fancy word that means a type of molecule made up of lots of smaller molecules all joined together. It's like building a big tower out of lots of little blocks - the blocks are the small molecules and the tower is the polyene. One important thing about polyene is that it has a special structure that makes it able to absorb light. That means it can do things like turn light into energy, or even change colors depending on the type of light it absorbs. Polyenes are used in lots of different things, like medicine or even food coloring, because of how versatile they are. So basically, polyene is just a bunch of tiny building blocks put together in a certain way that can do cool things with light.